Consider the given statements and select the true ones.
(a) health could be designed as a state of complete - physical, mental and social well being
(b) pathogens can enter our body by various means, multiply and not interfere with normal vital activities
(c) Salmonella typhi is a paihogenic virus which causes typhoid fever
(d) Plague and diphtheria are bacterial disease in man
A. (1) A and B
B. (2) C and D
C. (3) A and D
D. (4) A,C and D
