4146: A box contains 5 sets of balls while there are 3 bails in each set. Each set of balls has one colour which is different from every other set. What is the least number of balls that must be removed from the box in order to claim with certainty that a pair of bails of the same colour has been removed?
(A) 6
(B) 7
(C) 8
(D) 9
4147: Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms?
(a) Ecotone
(b) Ecological niche
(c) Habitat
(d) Home range
4148: A table has three drawers. It is known that one of the drawers contains two silver coins, another contains two gold coins and the third one contains a silver coin and a gold coin. One of the drawers is opened at random and a coin is drawn. It is found to be a silver coin. What is the probability that the other coin in the drawer is a gold coin ?
(a) 0.25
(b) 1.00
(c) 0.50
(d) 0.60
4149: Match List I with List II and select the correct answer using the codes given below the lists :
List I (Disease)
I. Malaria
II. Poliomyelitis
III. Tuberculosis
IV. Ringworm
List II (Organism)
(A) Fungi
(B) Bacteria
(C) Virus
(D) Protozoan
Codes:
(a) I-D, II-C, III-B, IV-A
(b) I-D, II-C, III-A, IV-B
(c) I-C, II-D, III-A, IV-B
(d) I-C, II-D, III-B, IV-A
4150: Those who joined Mahatma Gandhi during the Champaran struggle included
(a) Vallabhbhai Patel and Vinobha Bhave
(b) Jawaharlal Nehru and Rajendra Prasad
(c) Rajendra Prasad and Anugraha Narayan Sinha
(d) Mahadev Desai and Maniben Patel