146q: drug which is given for prophylaxis of meningococcal contacts ?
a. erythromycin
b. tetracycline
c. rifampicin
d. pencillin
147q: all are measures of primordial prevention of hypertension except ?
a. dietary changes
b. restrain smoking
c. identification of hypertensive
d. regular physical exercise
148q: disease to be eradicated by the year 2000 AD is ?
a. typhoid
b. tetanus neonatorum
c. filaria
d. malaria
149q: in calculating the incidence of AIDS , denominator is ?
a. population at risk
b. total population
c. mid year population
d. observed population
150q: one family is choosed at random . then every fifth family is chosen . the method used is ?
a. cohort study
b. systematic sampling
c. stratified sampling
d. random sampling
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