* Tapi rivers flow through a rift valley.

* The Tapi River is a river in central India located to the south of the Narmada river that flows westwards before draining into the Arabian Sea.

* The river has a length of around 724 km and flows through the states of Maharashtra, Gujarat and Madhya Pradesh.

* It flows through Surat, and is crossed by the Magdalla, ONGC Bridge.

* The Tapti travels east to west and flows though the Indian states of Maharashtra, Gujarat and Madhya Pradesh.

* It drains into the Gulf of Khambhat, in the Arabian Sea, in Gujarat.

* Rice requires high temperature above 25-degree Celsius and high humidity with annual rainfall above 100 cm to grow.

* The traditional method for cultivating rice is flooding the fields while, or after, setting the young seedlings.

* This simple method requires sound irrigation planning but reduces the growth of less robust weed and pest plants that have no submerged growth state, and deters vermin.

* While flooding is not mandatory for the cultivation of rice, all other methods of irrigation require higher effort in weed and pest control during growth periods and a different approach for fertilizing the soil.

* The season of autumn comes in the months of October and November.

* As per the Hindu calendar, this season comes in Ashwin and Kartik months.

* The hot and humid weather starts disappearing and leaves start falling off the trees in this season, so it is also known as the fall season.

* The sky becomes clearer as compared to the monsoon season and clear moon can be seen in the sky along with countless starts that look like pearls scattered in the sky.

* The water of the rivers and ponds settle down and becomes clean and there is no mud in the villages. The insects and mites gradually start disappearing with the arrival of autumn.

* In the first phase of the green revolution, the use of HYV seeds was restricted to the more affluent states of Andhra Pradesh and Tamil Nadu.

* The use of HYV seeds primarily benefited the wheat-growing regions only.

* In the second phase of the Green Revolution the HYV technology spread to a large number of states and benefited more variety of crops.

* The spread of Green revolution enabled India to strengthen technology in agriculture and to achieve self-sufficiency in food grains.

* The major rabi crop in India is wheat, followed by barley, mustard, sesame and peas.

* The rabi crops are sown around mid-November, preferably after the monsoon rains are over, and harvesting begins in April / May.

* The crops are grown either with rainwater that has percolated into the ground or using irrigation.

* Good rain in winter spoils the rabi crops but is good for kharif crops.

* The correct answer is Narmada river.

* The Dhuandhar Falls are located on the Narmada River in Bhedaghat, Madhya Pradesh.

Narmada:

* It is originated from Amarkantak, rises from the Maikal ranges.

* Amarkantak is located in the Anupprur district of Madhya Pradesh.

* Narmada river mainly flows in central India.

* It is the 5th longest river and overall longest west-flowing river in India.

* Mouths: Arabian Sea, Gulf of Khambhat

● The correct answer is Royal Bengal Tiger.

● Sundarban mangrove forest is the single largest home of the Royal Bengal Tiger( Panthera tigris ).

● Sundarban is also the only mangrove forest in the world having the tiger as its indigenous population

● This delta is formed by Ganga and Brahmaputra rivers.

● More than three fourths of the Royal Bengal Tigers in eastern India can be found in the marshy delta of the Sunderbans.

● The Green Revolution in India was an introduction of high-yielding varieties (HYV) of seeds for wheat and rice.

● The Green Revolution was a period that began in the 1960s during which agriculture in India was converted into a modern industrial system by the adoption of technology, such as the use of high yielding variety (HYV) seeds, mechanized farm tools, irrigation facilities, pesticides and fertilizers.

● Most important HYVs can be found among wheat, corn, soybean, rice, potato, and cotton. They are heavily used in commercial and plantation farms.

* The decadal growth rate of population between 2001-2011 is 17.70 percent.

* It is higher in urban (31.8%) than rural (12.3%).

* India’s literacy rate has gone up from 64.83 per cent in 2001 to 74.04 per cent in 2011.

* India is the second most populated country in the world with nearly a fifth of the world's population.

* According to the State Census 2011, the most populated state in India is Uttar Pradesh with a population of 19.96 crores. The least populated state in the country is Sikkim with a population of 60, 7688.

Hence, option C is the right answer.

Grand Trunk Road:

* This road was built by Sher Shah Suri as Shahi (Royal) road.

* Reason: To strengthen and consolidate his empire from the Indus Valley to the Sonar Valley in Bengal.

* Later, the road was renamed the Grand Trunk (GT) road during the British period, to connect Calcutta and Peshawar.

* At present, it extended from Amritsar to Kolkata.

* It is bifurcated into 2 segments:

* (a) National Highway(NH)-1 from Delhi to Amritsar

* (b) NH- 2 from Delhi to Kolkata