Which sentence contains an interjection?

a) Peggy, would you pass me the peas?

b) Solving the problem was easy, my dear sister!

c) Let's go to the circus!

d) Oh! Now I remember where I put my wallet

The correct answer is D) Oh! Now I remember where i put my wallet. That is because an interjection is an abrupt remark or an exclamation and exclamations are almost always followed by an exclamation mark. This can include numerous types of sounds like Oh!, ah!, or things like dear god!, my goodness!, or similar things.