He was make to resign.
To resign was his obligation.
Circumstances obliged him to resign.
Registration obliged him.
Answer is Wrong!
Answer is Right!
The correct answer is C. Circumstances obliged him to resign.
Option A is incorrect because it implies that someone forced him to resign. Option B is incorrect because it implies that he had a moral obligation to resign. Option D is incorrect because it implies that he was obliged to resign by some sort of legal or contractual obligation.
The sentence “He was obliged to resign” means that he was forced to resign by the circumstances of his situation. For example, he might have been obliged to resign because he was caught in a scandal, or because he was no longer able to do his job effectively.