To study the incidence of malaria, according to various age and sex groups, in a village, we need to undeake: (A) Descriptive, (B) Case-control study, (C) Coho study, (D) Experimental study
Answer is A. Descriptive studies are concerned with observing the distribution of disease or health-related characteristics - When is the disease occurring, where is it occurring, who is getting the disease.Park 23e pg: 63