221: The evidence for the rotation of stars comes mainly from the
(a) Doppler effect
(b) Photoelectric effect
(c) Stark effect
(d) Zeeman effect
222: Which of the following is geographically closest to Great Nicobar ?
(a) Sumatra
(b) Borneo
(c) Java
(d) Sri Lanka
223: In 1921 the Session of the Indian National Congress was held when its President was in prison and with some other leader acting as President. Who was the Congress President in prison?
(a) Mahatma Gandhi
(b) Mohammad Ali
(c) C. R. Das
(d) Abul Kalam Azad
224: Khilafat movement stressed on:
(a) Restoration of Turkish Khalipha as the head of Indian Muslims
(b) Reservation of seats for Muslim community in Government services
(c) Independent Pakistan
(d) India's Independence
225: Who amongst the following was the first to state that the Earth was spherical?
(a) Aristotle
(b) Copernicus
(c) Ptolemy
(d) Strabo