The correct answer is Option 4 i.e. Yamuna.

The Taj Mahal is located on the southern bank of the Yamuna River in Agra, Uttar Pradesh.

Key Features of Its Riverine Setting:

• Architectural Purpose: The Yamuna was incorporated into the Taj's design, reflecting its grandeur in the marble facade and serving as a natural cooling system .

• Historical Link: Mughal emperor Shah Jahan chose this riverside site for symmetry with his proposed Black Taj Mahal (never built) across the river .

• Current Challenges: Declining Yamuna water levels and pollution threaten the Taj's foundation, with insect-borne stains from the river damaging its white marble .

Why Not Others?

• Ganga: Flows through eastern Uttar Pradesh (Varanasi/Prayagraj), not Agra.

• Sutlej/Indus: Located in Punjab/Pakistan, far from the Taj's location.

The correct answer is option 2 i.e. Mercury.

• A liquid metal consists of alloys with very low melting points which form a eutectic that is liquid at room temperature.
• The standard metal used to be mercury, but gallium-based alloys, which are lower both in their vapor pressure at room temperature and toxicity, are being used as a replacement in various applications

The correct answer is option 2 i.e. Cynology.

The correct answer is option 3 i.e. Article 370.

The correct answer is option 2 i.e. Adam Smith.

• The Theory of Moral Sentiments given by Adam Smith.
• He was a Scottish economist,  philosopher.
• Smith was the son of the comptroller of the customs at Kirkcaldy, Fife, Scotland.
• He is known as "the father of modern economics" or ''The father of Capitalism'' and was a prominent thinker within the classical school of economics.
• He is also known for creating the concept of gross domestic product (GDP) and for his theory of compensating wage differentials.

The correct answer is option 1 i.e. Khavada

NTPC to set up India's Largest Solar Park at Khavada, Rann of Kutch.

A) NTPC has received go ahead from MNRE to set up a 4750 MW renewable energy park.

B) It will be India's largest solar park to be built by the largest power producer of the country.

C) NTPC aims to build 60GW Renewable Energy Capacity by 2032.

The correct answer is option 4 i.e. Trophospere.

• Earth's atmosphere has a series of layers, each with its own specific traits.
• Moving upward from ground level, these layers have been named the troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
• The troposphere is the layer closest to Earth's surface. It is 7 to 20 km thick and contains half of Earth's atmosphere.
• The stratosphere is the second layer. It starts above the troposphere and ends about 50 km above the ground. Ozone is abundant here.
• The mesosphere starts at 50 km and extends to 85 km high.
• The thermosphere extends from about 90 km to between 500 and 1,000 km.
• The exosphere, the highest layer, is extremely thin and is where the atmosphere merges into outer space.

The correct answer is option 4, i.e. Parathyroid hormone (PTH).

• A hormone called Parathyroid hormone (PTH) regulates the levels of calcium and phosphorus in the blood.
• It is released by the parathyroid glands in the neck.

The correct answer is option 4 i.e. Bhutan

BHIM-UPI jointly launched by the Finance Ministers of Bhutan and India in Bhutan.

A) Launch fulfills commitment made by two countries during the Prime Minister of India's state visit to Bhutan in 2019.

B) With the launch the payment infrastructures of the two countries are seamlessly connected.

C) The move will benefit a large number of Tourists and Businessmen from India who travel to Bhutan each year.

The correct answer is Option 4 i.e. Erode Venkatappa Ramasamy.

1. E.V. Ramasamy (1879-1973) was an Indian social activist and politician who started the Self-Respect Movement and the Dravidar Kazhagam (DK).

2. He led a revolt against Brahminical Hinduism and the inequities of the caste system in a society loaded with superstition and obscurantism, caste divisions and privilege.