Correct option: C.1 - Bromobutane, 2 - Bromobutane, 1 - bromo-2-methylpropane, and 2 - bromo-2 - methylpropane
(c) 1-Bromobutane, 2 - Bromobutane, 1- bromo-2-methylpropane, and 2-bromo-2-methylpropane
Explanation: Isomers are compounds having the same molecular formula but different structures. In the given straight-chain 4-C compounds, Br is placed at different positions but the molecular formula is same.
In the given branched 4-C compounds, there is a branching of -CH3 at carbon 2 but Br is placed at positions 1 and 2 respectively.
So, all of these are isomers since they have the same molecular formula but different structures.