Please choose the correct ending to complete the given sentence: Making a sandwich: A sandwich bun is being sliced open. Turkey is placed on the bred. then ham

Ending1: ham, cheese and onions are placed on top. Ending2: and cheese are cooked in a pan. Ending3: is place on the bread. Ending4: and tomatoes are placed on top.

Answer format: ending1/ending2/ending3/ending4