Which of the following disease is due to an allergic reaction

A chemical substance produced by a microorganism for inhibiting the growth of another is

‘Bacillary dysentery' is caused by

Assertion : Cannabis sativa is a powerful anti-depressant.

Reason : Hashish and Marijuana are derived from it.

‘Polio' is caused by

In the sigmoid curve of growth, the alphabets indicate the sequence of events. Choose the correct option where the alphabet specifies the event.