436: A person travels 12 km due North, then 15 km due East, after that 15 km due West and then 15 km due South. How far is he from the starting points?
(A) 12 km
(B) 33 km
(C) 61 km
(D) 60 km
437: Among the Indian languages, which one is spoken maximum in the world after Hindi?
(a) Malayalam
(b) Tamil
(c) Telugu
(d) Bengali
438: First non-Congress government to come in power in any Indian State is:
(a) DMK in Tamil Nadu
(b) Communist Party of India in Kerala
(c) CPI (M) in West Bengal
(d) None of the above
439: A hydrogen inflated polythene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will
(a) Decrease in size
(b) Flatten into a disc-like shape
(c) Increase in size
(d) Maintain the same size and shape
440: Assertion (A) :
Formic acid is a stronger acid than acetic acid.
Reason (R):
Formic acid is an organic acid.
(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