Which of these sentences contains an oxymoron?

Mr. Keynes was a workaholic who found vacations as relaxing as six rounds wrestling with an alligator.

Even though he wanted to travel, Mr. Keynes could not think of any vacation spot as comfortable as his own living room.

The island landscape seemed to come alive before Mr. Keynes' eyes, flora and fauna swimming through his vision in every direction.

Although he didn't want to, Mr. Keynes took his laptop along with his bathing suit and other holiday clothes because this was a working vacation.

Question

Which of these sentences contains an oxymoron?

 Mr. Keynes was a workaholic who found vacations as relaxing as six rounds wrestling with an alligator.

 Even though he wanted to travel, Mr. Keynes could not think of any vacation spot as comfortable as his own living room.

 The island landscape seemed to come alive before Mr. Keynes' eyes, flora and fauna swimming through his vision in every direction.

 Although he didn't want to, Mr. Keynes took his laptop along with his bathing suit and other holiday clothes because this was a working vacation.

anonymous · Answer

Not sure if I'm correct or not but I'm feeling the first one may be the answer.