391: Unit of distance used in navigation is:
(a) Nautical mile
(b) Kilometre
(c) Light year
(d) Yard
392: Assertion
Solar eclipse occurs on a new moon day
Reason
Moon is in conjunction with the sun
(a) if A and R both are correct and R is the correct explanation of A
(b) if A and R both are correct but R is not the correct explanation of A
(c) if A is correct and R is incorrect
(d) if A is incorrect and R is correct
393: A man is waiting for a bus on routes 10, 17 and 25. The bus on route 10 comes every 10 min, bus on route 17 comes every 20 min, and bus on route 25 comes every 40 min. After the man reaches the stop, a bus just leaves the stop. What is the minimum time for which he has to wait to get a bus?
(a) 2 min
(b) 4 min
(c) 6 min
(d) 10 min
394: Which one of the following was the contemporary Bengal king during the time of Harsha of Kannauj ?
(a) Bhaskaravarman
(b) Divakaramitra
(c) Devagupta
(d) Sasanka
395: Assertion (A) :
Sodium metal is stored under kerosene.
Reason (R):
Metallic sodium melts when exposed to air.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is NOT a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true