Choose the most effective word to fill in the blank to make the sentence meaningfully complete. His _______ of the subject was so good that students had very few questions to raise.

Correct answer: exposition

Explanation: Context: The word ‘exposition’ means a clear and detailed explanation of a subject. It suits the sentence where the speaker’s clarity of teaching left few doubts. 1. exposition ✅ – correct; means detailed explanation. 2. clarity ❌ – meaning close but grammatically less fitting. 3. disposing ❌ – unrelated meaning. 4. exposure ❌ – means being open to something, not explaining. Correct Sentence/Example Sentence: His exposition of the subject was so good that students had hardly any questions.