Which of the following Planet has the smallest diameter?

Which of the following Planet has the smallest diameter?

مندرجہ ذیل میں سے کس سیارے کا قطر سب سے چھوٹا ہے؟
Explanation

Mercury With a diameter of 4,879 km (3031.67 mi).

Mercury is the smallest planet in our Solar System.

Nearest Planet to Sun.

Fastest Planet.