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2241. Which of the following is least infectious ?

A. leprosy

B. hepatitis

C. tuberculosis

D. conjunctivitis

Explanation:

2242. Strontium accumulation in bones resulting in decline in red blood cell formation, is caused by

A. Soil pollution

B. Water pollution

C. Noise pollution

D. Radioactive pollution

Explanation:

2243. Epidemiological triad refers to

A. atent, disease and environment

B. host, disease and environment

C. host, agent and disease

D. host, agent and environment

Explanation:

2244. Which disease is caused by a bacterial genus in milk ?

A. Typhoid

B. Cholera

C. Diptheria

D. Dysentery

Explanation:

2245. Higher plants take up nitrogen as

A. nitrites only

B. nitrates only

C. nitrates and ammonia

D. urea

Explanation:

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