Typhoid and cholera are typical examples of____.
A. Infectious diseases
B. Air-borne disease
C. Water-borne disease
D. None of these
Short-sightedness can be corrected by using_____.
A. Convex lens
B. Concave lens
C. Convex-concave lens
D. Concave-convex lens
Which of the following diseases is caused by virus?
A. Small pox
B. Tuberculosis
C. Malaria
D. Cholera
A person with which of the following blood groups can receive blood of any group?
A. A
B. AB
C. B
D. O
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