Correct Answer: He instructed his brother to pack his bags and leave then.

Solution : The second option is the correct choice.

The given sentence is a direct speech. The basic steps for changing or converting direct speech into indirect speech are:

• The reporting verb "said" is changed to "instructed", as instruction is given to the brother, and "to-infinitive" would be used.
• The second-person pronoun "your " is changed to the third-person pronoun "his".
• The adverb "now " is changed to "then ".

Hence, the correct answer is: " He instructed his brother to pack his bags and leave then ."