Choose the correct sentence from the following:

The correct answer is Option B (If he had studied hard, he would have got a first class.).

Key Points:
• This question tests conditional sentences, specifically the Third Conditional (expressing an unreal past situation).
• Rule for Third Conditional:
• Structure: If + Past Perfect (had + V3), ... would have + V3.
• Evaluating options:
• Option 1 uses 'has got' - incorrect tense.
• Option 2 uses 'had studied' in the if-clause and 'would have got' in the main clause - perfectly follows the Third Conditional rule.
• Option 3 uses 'he have got' - ungrammatical.
• Option 4 uses 'would got' - ungrammatical (should be would have got).
• Therefore, Option 2 is the correct sentence.
• Key Takeaway: Third Conditional structure: 'If + had + V3, ... would have + V3'.