Which of the following is the smallest planet in our solar system?
Which of the following is the smallest planet in our solar system?
(A) Venus
(B) Mercury
(C) Neptune
(D) Uranus
Correct option is (B) Mercury. The smallest planet is our solar system is Mercury. It is approximately one-third the width of the Earth. It has an equaotorial diameter of 4,880 kilometers or 3,032 miles.