Which of the following is not a compound noun?

The shopkeeper offered to exchange the goods. The shopkeeper offered to refund the money. (combine using ‘either-or’)

Some of us wanted to stay longer, ________?

“don’t sleep late and miss the bus”, said Mr.Varma. (Choose the correct reported speech)

Pack : wolves:: ________: books

The operation______his pain, but the injuction alleviated it. (Choose the word opposite in meaning to the word underlined)