Out of the four alternatives, choose the one which can be substituted for the given words/ sentence.
A medicine to nullify the effect of poison

Correct option is C

The correct one-word substitution is (c) Antidote.
· Definition: A medicine taken to counteract a poison or toxin.
· Antidote (Hindi meaning): विषहर औषधि.
· Example: The doctor administered an antidote to neutralize the snake venom.
Meanings of other options:
· Antibody: A protein produced in response to and counteracting a specific antigen (प्रतिपिंड).
· Antibiotic: A medicine used to treat bacterial infections (प्रतिजैविक).
· Antigen: A substance that induces an immune response (प्रतिजन).