The Treaty of Salbai, was signed on 17 May 1782, and was ratified by Hastings in June 1782 and by Nana Phadnavis in February 1783. The treaty ended the First Anglo-Maratha War, restored the status quo, and established peace between the two parties for 20 years.

• The Indian Arms Act, 1878 was an act regulating the manufacture, sale, possession, and carrying of firearms. The act included the mandatory licensing to carry a weapon, but contained exclusions for some groups and persons. In 1959, Arms Act was passed with new strict rules.
• The Royal Titles Act 1876 was an Act of the Parliament of the United Kingdom which officially recognized Queen Victoria (and subsequent monarchs) as “Empress of India”.
• The Indian High Courts Act of 1861 was an act of the Parliament of the United Kingdom to authorize the Crown to create High Courts in the Indian colony. Queen Victoria created the High Courts in Calcutta, Madras, and Bombay by Letters Patent in 1862.
• The Dissolution of Marriage and Judicial separation (under the Indian Divorce Act, 1869). Due to the existence of diverse religious faiths in India, the Indian Judiciary has implemented laws separately for couples belonging to different religious beliefs. Mutual consent divorce procedure is relatively easier and fast while contested divorce procedure takes longer and depends on the religions of the couples.

Gandhara School developed in western frontiers of Punjab, near Peshawar and Afghanistan. Mathura School developed during period 1st and 3rd centuries BC on the banks of Yamuna River. It was influenced by all three religions- Jainism, Buddhism and Hinduism. Amaravati School flourished on the banks of the Krishna River.

Australia is the largest producer of bauxite in the world. It is a leading producer of gold, diamond, iron ore, tin and nickel. It is also rich in copper, lead, zinc and manganese. Kalgoorlie and Coolgardie areas of western Australia have the largest deposits of gold.

Africa is rich in mineral resources. It is the world’s largest producer of diamonds, gold and platinum. South Africa, Zimbabwe and Zaire produce a large portion of the world’s gold. The other minerals found in Africa are copper, iron ore, chromium, uranium, cobalt.

In 1985, Tenth Schedule was introduced in the Constitution as the Anti-Defection act to prevent defections. According to the tenth schedule of the constitution, the final authority to take a decision on the case of defection is the speaker of the house.

On the eastern and southern parts of the Deccan Plateau, the Red soil develops on crystalline igneous rocks.

The correct match is:

Ngultrum – Bhutan

Dong – Vietnam

Rufiyaa – Maldives

Kyat – Myanmar

Hence, option C is correct.

The United Nations has proclaimed May 22 for the International Day for Biological Diversity (IDB) to increase understanding and awareness of biodiversity issues. Biodiversity Day 2021 is a call to action for biodiversity.

The theme for International Day for Biological Diversity 2021 is “We’re part of the solution”. The slogan was chosen to be in continuation of the momentum generated last year under the over-arching theme, “Our solutions are in nature”, which served as a reminder that biodiversity remains the answer to several sustainable development challenges. Hence, option B is correct.

Biotin, also called vitamin B₇, is one of the B vitamins. It is involved in a wide range of metabolic processes, both in humans and in other organisms, primarily related to the utilization of fats, carbohydrates, and amino acids. Biotin is a water-soluble B-vitamin. Vitamin B7 is also essential in improving the cognitive functioning of the brain. It helps in repairing the brain cells and in turn, is used for treating symptoms associated with psychotic conditions like brain fog, depression, schizophrenia, hallucinations, etc.