3491: "Reserprine" derived from the plant "Serpentina" is used to:
(a) Alleviate pains
(b) Alleviate high blood pressure
(c) Alleviate low blood pressure
(d) Cure rickets
3492: Each of the 3 persons is to be given some identical items such that product of the numbers of items received by each of the three persons is equal to 30. In how many maximum different ways can this distribution be done ?
(A) 27
(B) 24
(C) 33
(D) 21
3493: The release of which one of the following into ponds and wells helps in controlling the mosquitoes?
(a) Gambusia fish
(b) Snail
(c) Crab
(d) Dogfish
3494: Which one among the following is called philosopher's wool?
(a) Zinc oxide
(b) Zinc chloride
(c) Zinc nitrate
(d) Zinc bromide
3495: Groups each containing 3 boys are to be formed out of 5 boys-A,B,C,D and E such that no one group contains both C and D together. What is the maximum number of such different groups ?
(A) 8
(B) 7
(C) 5
(D) 6