3) Decreased resistance to cold.
         4) Soreness of mouth.
    (a)  1 and 3
    (b)  2 and 4
    (c)  1, 3 and 4
    (d)  1, 2 and 3
Ans: (a)
44. Leishmania, the causative "agent of kala-azar, multiplies asexually by [NDA 2010]
    (a) budding
    (b) binary fission
    (c) multiple fission
    (d) sporogony
Ans: (b)
45. Which one of the following is the correct group of diseases exclusively caused by virus? [NDA 1991]
    (a) Measles, syphilis, rabies, cholera
    (b) Poliomyelitis, syphilis, chicken pox, mumps
    (c) Cholera, tuberculosis, meningitis, syphilis
    (d) Measles, small pox, mumps, rabies
Ans: (d)
46. Which of the following diseases is caused by the bite of a mad dog: [CBI 1992]
    (a) Hydrocele
    (b) Hydrophobia
    (c) Hydrocephatus
    (d) Hydroperitoneum
Ans: (b)
47. The vitamin which is very liable and easily destroyed during cooking as well as storage is:
    (a) Vitamin A
    (b) Vitamin B6
    (c) Vitamin C
    (d) Vitamin K
Ans: (c)
48. The compound used in anti-malarial drug is: [RRB 1991]
    (a) aspirin
    (b) neoprene
    (c) isoprene
    (d) chloroquin
Ans: (d)
49. Which of the following is a skin disease?
    (a) Anaemia
    (b) Pellagra
    (c) Osteomalacia
    (d) Rickets
Ans: (b)
50. Which of the following vitamins is essential for poor bone and teeth formation?