The passage draws a two-step picture of where res judicata applies: its original, statutory home, and the extension the Supreme Court has read into it. Checking each option against that picture:
Since the doctrine operates in both settings described in the passage, picking only one of civil suits or writ petitions would understate its reach.
So the correct answer is (D): Both (A) and (B).
The passage sets a two-part condition for res judicata to attach to a writ petition, so each option should be checked against both parts rather than just one.
Both features have to be present together, a decision on the merits and a speaking order recording those reasons, before an earlier writ dismissal can block a later petition.
So the correct answer is (C): Both (A) and (B).
The passage gives more than one reason for the doctrine of res judicata, and the question asks which of them the doctrine actually rests on. Each option lines up with a specific sentence in the passage:
Res judicata is not built on a single justification; the passage treats protecting parties from repeat litigation, serving the public interest in finality, and bringing litigation to a close as three connected strands of the same doctrine.
So the correct answer is (D): All of these.
This question mixes an application of the rule, option A, with a statement of its rationale, option B, and tests whether both hold up against the passage, while option C tries to reverse the actual extension the Supreme Court made.
A states how the rule plays out on facts, B states why the rule exists, and both survive scrutiny, while C misdescribes the doctrine's actual reach.
So the correct answer is (D): Both (A) and (B).
The key fact here is why the High Court dismissed Mr. X's writ petition. It was dismissed because he had an alternative remedy available, which is a threshold, procedural reason for not entertaining the petition, not a ruling on whether his dismissal from service was actually justified. That distinction decides the whole question.
The High Court's dismissal for an alternative remedy never touched the merits of Mr. X's case, so there is nothing final for the employer's res judicata objection to rest on.
So the correct answer is (B): Res judicata is not applicable.