Major Constituent of natural gas is.

Methane

 The correct answer is option 3. Methane.

The major constituent of natural gas is Methane.

Methane \((CH_4\)) is the primary component of natural gas, typically constituting over 90% of its composition. While propane and butane are also present in natural gas in smaller amounts, methane is by far the most abundant component. Carbon is not a major constituent of natural gas; rather, it is a component of methane and other hydrocarbons found in natural gas.