Which of the following contains a vague pronoun reference?

 - Steve gave a beautifully bound copy of his favorite book, One Hundred Years of Solitude, to Jake.
 - Steve gave Jake a beautifully bound copy of One Hundred Years of Solitude, which is his favorite book.
The second answer choice contains a vague pronoun reference. The pronoun his could refer to Steve or Jake.
Steve gave Jake a beautifully bound copy of One Hundred Years of Solitude, which is his favorite book.
The first answer choice shows a possible correction for the vague pronoun reference. The text has been rewritten so that the meaning is clear.
Steve gave a beautifully bound copy of his favorite book, One Hundred Years of Solitude, to Jake.