The atmospheres of the jovian planets are made of primarily: a. liquid metallic hydrogen b. methane and ammonia c. oxygen and nitrogen d. hydrogen and helium

d. hydrogen and helium

Explanation:

The Jovial planets are the planets mostly made of gases and ice in our solar system. These planets are Jupiter, Saturn, Uranus and Neptune. The planets are mostly gas and ice. The atmosphere of these planets are mostly Hydrogen and Helium. Although Uranus and Neptune mostly contain, methane and ammonia, however, they do have hydrogen and helium in their atmosphere.