What will be the fourth next member of the homologous series of the compound propene?

Correct option is A

The correct answer is (a) $$C_7H_{14}$$​.
Explanation:
A homologous series consists of compounds that differ by a $$CnH_2n.$$​CH₂ unit. The general formula for alkenes (to which propene belongs) is
1. Propene:$$C_3H_6$$​
2. Adding four CH₂ units to propene gives the formula:$$C_3H_6+4(CH_2)=C_7H_{14}$$​
3. The resulting compound is $$C_7H_{14}$$​, which is heptene, the fourth member in the homologous series after adding four CH₂ units.
Clarifications for Other Options:
· $$C_2H_4$$​: Ethene, which comes before propene in the homologous series.
·$$C_6H_{12}:$$​Hexene, the third member after propene.
· $$C_5H_8$$​: Does not follow the general formula of alkenes (CnH2n).