1. The Union Cabinet has approved the establishment of the G20 Secretariat.

2. It will be responsible for the implementation of overall policy decisions and arrangements required for the conduct of India's upcoming G20 Chairmanship.

3. India will, for the first time, chair the G20 from 1 December 2022 to 30 November 2023, culminating with the G20 Summit in India in 2023.

1. Bangladesh and India signed two contracts for the construction of a new broad-gauge line between Khulna-Darshana and converting the meter gauge line between Parbatipur and Kaunia into a dual-gauge line.

2. Being implemented with financing under the Indian Line of Credit (LOC).

Under the Ayushman scheme, a family of a transgender gets coverage of up to ₹ 5 lakh. Treatment up to ₹5 lakh is also free.

The sperm cell is the smallest cell in the human body. The volume of these cells is quite tiny. The head of a sperm cell is roughly 4 micrometres long, about the same size as a red blood cell (RBCs). Egg cells are the biggest cells in the human body (ovum).

A. H. Taylor and Leo C. Young were American scientists who played a crucial role in the development of radar technology. They are credited with creating the first radar system in the United States. Radar, which stands for "Radio Detection and Ranging," is a technology that uses radio waves to detect and locate objects. It became essential during World War II for various applications, including aircraft detection and navigation. The work of Taylor and Young contributed significantly to the advancement of radar technology and its subsequent widespread use in military and civilian applications.

The Rawatbhata Nuclear Power Plant is located in Rawatbhata, a town in the Chittorgarh district of the Indian state of Rajasthan. It is a complex that houses several nuclear reactors, including pressurized heavy water reactors (PHWR) and pressurized heavy water reactors of the Indian design. The plant plays a significant role in contributing to the electricity generation capacity of the region and the country.

The space agency that sent 104 satellites in a single mission in 2017 is the Indian Space Research Organisation (ISRO). The correct answer is (C) ISRO. ISRO's Polar Satellite Launch Vehicle (PSLV-C37) set a record by launching 104 satellites in a single mission on February 15, 2017.

The telephone was invented by Alexander Graham Bell. The correct answer is (A) Alexander Graham Bell. Bell is widely recognized for his pioneering work in the development of the telephone, and he received the first US patent for the invention of the telephone in 1876.