Choose the best option to fill in the blank with the correct connector.

He chose not to study medicine because of his parents' wishes, ____ they wanted him to become an engineer.

as

The correct answer is Option (3) → as

The conjunction as is used here to mean "because" or "since," indicating the reason for the parents' wishes being a factor in his decision. The second clause (they wanted him to become an engineer) explains the content or nature of the parents' wishes mentioned in the first clause.

• As (Conjunction): Used to state the reason or cause of something.

• While (Conjunction): Used to show contrast or concurrency (e.g., While he studied law, his sister studied medicine).

• So that (Conjunction): Used to express purpose or result (e.g., He studied hard so that he could pass the exam).

• And (Conjunction): Used to join two equal, often sequential, ideas (e.g., He quit, and he found a new job).