India, Nov. 28 -- 1. Scientists analysing 15 years of data from NASA's . Gamma-ray Space Telescope found a mysterious glow of gamma rays surrounding the halo region of our galaxy, and the energies and characteristics of these rays, scientists say, matched those of a kind of hypothetical dark matter particle. Fill in the blank.

A. Spitzer

B. Chandra

C. Fermi

D. Kepler

2. Which 19-year-old chess player has become the youngest FIDE World Cup champion?

A. Javokhir Sindarov

B. D Gukesh

C. Sergey Karjakin

D. R Praggnanandhaa

3. . 26 is celebrated as the Constitution Day ('Samvidhan Divas') every year. Fill in the blank.

A. January

B. October

C. November

D. April

4. Prime Minister Narendra Modi on Wednesday inaugurated the world's...