Which sentence is punctuated correctly?

Justin couldn’t decide if he wanted cereal, oatmeal, or, a bagel for breakfast.

Justin couldn’t decide if he wanted cereal, oatmeal, or a bagel for breakfast.

Justin couldn’t decide if he wanted cereal oatmeal, or a bagel for breakfast.

Justin couldn’t decide if he wanted cereal, oatmeal, or a bagel, for breakfast.