3671: Widespread resistance of malarial parasite to drugs like chloroquine has prompted attempts to develop a malarial vaccine to combat malaria. Why is it difficult to develop an effective malaria vaccine ?
(a) Malaria is caused by several species of Plasmodium
(b) Man does not develop, immunity to malaria during natural infection
(c) Vaccines can be developed only against bacteria
(d) Man is only an intermediate host and not the definitive host
3672: Match List I with List II and select the correct answer by using the codes given below the lists :
List I-------List II
I. Malaria------- (A) Bone marrow
II. Filaria------- (B) Brain
III. Encephalitis------- (C) Muscle
IV. Leukaemia------- (D) Lymph node
-------------- (E) Blood cells
Codes:
(a) I-E, II-C, III-B, IV-A
(b) I-E, II-D, III-B, IV-A
(c) I-D, II-C, III-E, IV-A
(d) I-E, II-D, III-A, IV-B
3674: While delivering the presidential address, the Congress President who advocated the introduction of Roman script for Hindi language was
(a) Mahatma Gandhi
(b) Jawaharlal Nehru
(c) Abul Kalam Azad
(d) Subhas Chandra Bose