Which one among the following is a terrestrial planet?

Mercury

The correct answer is Option (1) - Mercury

The planets Mercury, Venus, Earth, and Mars, are called terrestrial because they have a compact, rocky surface like Earth's terra firma. The terrestrial planets are the four innermost planets in the solar system. Jovian planets refer to a group of four planets in the solar system. They are also known as gas giants. The four Jovian planets are: Jupiter, Saturn, Uranus, and Neptune. These planets also comprise the outer planets of our solar system and hence are also called outer planets.