A Selection bias

B Interviewer bias

C Information bias

D Recall bias

A 2005

B 2010

C 2015

D 2050

A Coho study

B Case-control study

C Cross sectional study

D Field trial

A Mesopotamian Medicine

B Greek Medicine

C Indian Medicine

D Chinese Medicine

A 14

B 16

C 18

D 21

A Provision of adequate drinking water

B Prevention of water pollution

C Provision of adequate irrigation water

D Provision for digging of wells

A Active surveillance

B Passive surveillance

C Sentinel surveillance

D Monitoring

A Clinical trial

B Analytic study

C Descriptive study

D Experimental study

A Culture

B Socialization

C Internalization

D Custom

A Water purity

B Milk purity

C Air polution

D Food stardardization