I need help with question is correct answer and accounting

Dr. Johnson sold medical equipment she purchased two years earlier for use in her practice. Her cost and adjusted basis in the equipment is $80,000. She incurred selling expenses of $5,000. The buyer paid $95,000 cash and assumed Dr. Johnson's $15,000 remaining loan on the equipment. What is the amount of her gain, and where on Form 4797 will she report the sale? a) $25,000 on Part I b) $25,000 on Part IT c) $30,000 on Part I d) $30,000 on Part IV