Which of the following spacecraft never touched the moon?

Mariner 4 is the correct answer because it was a robotic spacecraft sent by NASA to explore Mars in 1965. It successfully conducted a flyby of the red planet, sending back the first close-up images of Mars' surface, but it never had a mission to the moon. The other options, such as Apollo 11, Apollo 13, and Apollo 15, were missions that specifically aimed to land astronauts on the moon.