Correct Answer: A person who is obedient and well-behaved

Solution : The first option is correct.

Explanation : The idiomatic expression as good as gold is commonly used to describe someone or something that is very good, reliable, or trustworthy. It does not imply a person's affection for gold but rather signifies a high level of goodness and dependability, often used to praise someone's behaviour or character.

Therefore, the correct meaning is: " A person who is obedient and well-behaved. "