A It is found equally between study and the control groups

B It is itself a risk factor for the disease

C Confounding can be eliminated by selecting a small group

D It is associated with either the exposure or the disease

A ac

B a

C ab

D bc

A Salk

B Hepatitis B vaccine

C 17-D Vaccine

D HDCV

A General Flea index

B Specific Flea index

C Incidence of Fle species

D Flea infestation Rate

A Mid arm circumference

B Head circumference

C Rate of increase of height and weight

D Chest circumference

A Lead time

B Screening time

C Serial interval

D Generation time

A The minimum capacity of a septic tank should be at least 100 gallons

B A capacity of 20-30 gallons or 2 & half to 5 c.ft. per person is recommended for household septic tanks

C The length of septic tank is usually equal to its breadth.

D There should be a minimum air space of 3 cm between level of liquid in the tank & under-surface of the cover

A Community paicipation

B Intersectoral coordination

C Equitable distribution

D Appropriate technology

A OCPs

B Condom

C IUCD

D Vaginal

A Modified plan of operation

B Malaria Eradication Programme

C Malaria Control Programme

D Roll back Malaria