Please choose the correct answer to the question: Which of the following is an example of heat transfer by conduction?

Answer1: a whole metal spoon getting hot when one end is in hot soup Answer2: the inside of a car in the sun getting very hot Answer3: a tar road getting hotter in the sun than a concrete sidewalk Answer4: a fireplace fire heating a room on a cold day

Answer format: answer1/answer2/answer3/answer4
Answer: answer1