Correct option is C
The word that can be filled in the blank is
‘physical’ to make the sentence grammatically and contextually correct.
• ‘
Physical’ refers to the body or material things, especially as opposed to the mind or spirit. (शारीरिक)
• As per the context, the sentence is referring to curing bodily diseases like TB or leprosy, which are physical diseases, hence, "physical" fits in very well & is the correct option.
Meanings of other given words and why they are incorrect:
•
Masculine – (relating to men or male characteristics) – irrelevant to the context. (पौरुष संबंधित)
•
Radical – (fundamental or extreme change or belief) – does not refer to diseases. (मूलभूत/कट्टर)
•
Stubborn – (unwilling to change one’s attitude) – a personality trait, not a disease. (हठी)