Hydrocarbons having the same formula but variations in structure are called isomers.
a. true
b. false

The given statement is true.

Explanation:

Isomers are defined as two or more compounds with same structural formula but different arrangement of atom and chemical properties.

For example: Butane, 2-methyl propane are isomers with structural formula , acetone and propanal both isomers to each other with same structural formula of .

58750.08068 is the answer i think

the answer is c.the valence of the atoms combine .