The correct answer is **I was disappointed as I was not able to find a suitable life partner.** (Option 2). **Comprehensive Derivation:** The correct answer is - "I was disappointed as I was not able to find a suitable life partner." Explanation & Key Takeaways: • From the given options, the most appropriate answer is "I was disappointed as I was not able to find a suitable life partner." • As is used to introduce events happening at the same time. • Eg. I worked as a waiter when I was a student. • Yet is used to express something as usual as in the past. • Eg. The weather was cold, yet bright and sunny. • Here, 1st sentence is dependent on 2nd so and cannot be used. • And is used to join two independent sentence, clauses, etc. • Option 4 is incorrect because "as" is not at right place. • Thus, Option 2 is correct option. **Option Elimination:** • **Option 1 (I was disappointed and I was not able to find a suitable life partner.)**: Incorrect distractor. • **Option 2 (I was disappointed as I was not able to find a suitable life partner.)**: Correct Answer; accurate according to canonical reference. • **Option 3 (I was disappointed yet I was not able to find a suitable life partner.)**: Incorrect distractor. • **Option 4 (As I was disappointed, I was not able to find a suitable life partner.)**: 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: I was disappointed as I was not able to find a suitable life partner. corresponds to Option (2).