Correct Answer: Ron told me that he had eaten his lunch at 2 p.m. the previous day.

Solution : The fourth option is the correct choice.

Reported speech, or indirect speech, is the form of speech used to convey what was said by someone at some point in time.

The steps of conversion are as follows:

• The reporting verb "said" is changed to "told".
• The connector "that" is used to introduce the reported clause.
• The time expression "yesterday" becomes "the previous day".
• There would be no change in the tense of the reported clause, as it is in the past perfect tense.

Therefore, the correct answer is: "Ron told me that he had eaten his lunch at 2 p.m. the previous day."