The correct answer is **temperamental** (Option 3). **Comprehensive Derivation:** The correct answer is 'temperamental'. Explanation & Key Takeaways: Let's look at the meaning of the words in the option. • amiable - friendly, kind, gracious. • touchy - sensitive or volatile. • temperamental - change, alteration. • ill-bred - ill-mannered because of a lack of upbringing or education. • Varying moods means changing moods thus 'temperamental' is the correct answer. • Hence, option 3 is the correct answer. Therefore, the correct sentence is -'Saravanan has sharply varying moods; he is temperamental'. **Option Elimination:** • **Option 1 (amiable)**: Incorrect distractor. • **Option 2 (touchy)**: Incorrect distractor. • **Option 3 (temperamental)**: Correct Answer; accurate according to canonical reference. • **Option 4 (ill bred)**: Incorrect distractor. **Exam Trap:** Be careful of misleading distractors and subtle terminology differences. Verify core properties before selecting your answer. **Memory Booster:** Core mnemonic rule: temperamental corresponds to Option (3).