Verified Answer :

Number(1).A carbon atom makes 4 bondings.As the second Carbon in the conpuond has only one hidrogen,it has to make other 3,two with the other carbon atoms,one of them Being a double,making the compound unsaturated.PS:Sorry for my english,um fron Brazil

Answer: The correct answer is option (1).

Explanation:

The general formula of alkanes (Saturated compounds) is given as:\(C_nH_{2n+2}\)

The general formula of alkene  (Unsaturated compounds)is given as:\(C_nH_{2n}\)

The general formula of alkynes (Unsaturated compounds)is given as:\(C_nH_{2n-2}\)

1. \(CH_3CHCHCH_3:C_4H_8\) unsaturated hydrocarbon

2. \(CH_3CH_2CH_3:C_3H_8\) Saturated hydrocarbon

3.\(CH_3CH_3:C_2H_6\) Saturate hydrocarbon

4. \(CH_4\) Saturated hydrocarbon