Anger, even when it is — has one virtue, it overcomes —.

✅ কেন সঠিক: ‘Even when it is sinful’ concedes a fault, and ‘one virtue’ names a good effect: anger overcomes sloth (laziness), because an angry person is driven to act. This pair gives a logical contrast.

❌ অন্য অপশন: Both books give খ (inevitable — desire), but ‘overcoming desire’ is not a clear virtue of anger, and ‘inevitable’ does not set up the concession. ‘unnecessary — malice’ and ‘intense — hate’ make little sense.

💡 মনে রাখুন: sloth = laziness (one of the seven deadly sins); anger rouses a person from sloth.

📌 জেনে রাখুন: The two reference books give খ; this site accepts ক on the logic of the sentence. Because the answers differ, the question is excluded from model tests.