Q.

IUPAC name of following hydrocarbon (X) is:                                 [2024]

1 3,4,7-Trimethyloctane  
2 2-Ethyl-2,6-diethylheptane  
3 2,5,6-Trimethyloctane  
4 2-Ethyl-3,6-dimethylheptane  

Ans.

(3)