44. Match the following columns
Column I Column II
A. Air-borne 1. Tetanus
B. Water-borne 2. Tuberculosis
C. Contact 3. Cholera
D. Wound 4. Syphilis
A B C D
(a) 2 3 1 4
(b) 2 3 4 1
(c) 3 2 4 1
(d) 4 3 2 1
45. Ricketts is a disease of the
A. Bones
B. Tissue
C. Muscles
D. Blood
46. Which of the following statements is correct
A. Pulmonary artery carries pure blood
B. Pulmonary artery carries impure blood
C. Pulmonary vein carries impure blood
D. None of these