Correct Answer: Her parents said to her, "Will the match proposed by us be acceptable to you?"

Solution : The fourth option is the correct answer.

The steps of conversion are as follows:

• The reporting verb "asked" is changed to "said".
• The modal verb "would" is changed to "will" to maintain the interrogative nature of the sentence.
• The third-person pronoun "her" is changed to the second-person pronoun "you". And "them" is changed to "us".
• The words of the speaker are enclosed in the inverted commas.

Therefore, the correct answer is: Her parents said to her, "Will the match proposed by us be acceptable to you?"