How many carbons are there in the longest chain for IUPAC nomenclature of the molecule CH_(3)-CH_(2)-CH(CH_(2)-CH_(2)-CH_(3))_(2)?

How many carbons are there in the longest chain for IUPAC nomenclature

1.	How many carbons are there in the longest chain for IUPAC nomenclature of the molecule CH_(3)-CH_(2)-CH(CH_(2)-CH_(2)-CH_(3))_(2)?
Answer» 4 6 7 9 Answer :C