Choose the correct option from the following:
Can Leonard use your phone? ______ is out of charge.

The correct answer is: His phone

The correct answer is "His phone".
Here, Leonard's phone is out of charge so the speaker is asking somebody whether Lenard can use his phone or not. Among the given options only "His phone" refers to Leonard's ownership of the phone and it is playing the same function as that of personal pronouns. So, the correct answer is "His phone".