Mosquito-repelling coils contain which of the following active ingredients?

After infection by pathogens,dead cells,dead pathogens,and liquid form the:

Assertion $(A):$ In Pneumonia and common cold, close contact with an infected person should be avoided.
Reason $(R):$ Pneumonia and common cold are airborne diseases.

Bulimia is a type of psychosis,which means . . . . . . .

Which of the following diseases can be controlled by the use of vaccines?

Match the following columns.

Column-$I$	Column-$II$
$(1)$ $HIV$	$(v)$ Oncogenic virus
$(2)$ Cancer	$(w)$ Microsporum,Trichophyton
$(3)$ Allergens	$(x)$ Retrovirus
$(4)$ Ringworm	$(y)$ Colostrum
	$(z)$ Serotonin