Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Compound (I) is cis-1,4-dimethylcyclohexane because both methyl ($Me$) groups point in the upward direction.

Compound (II) is trans-1,4-dimethylcyclohexane because one methyl group points up and the other points down.

Compound (III) is cis-1,3-dimethylcyclohexane as the methyl groups are attached at the 1 and 3 positions.

Since (I) and (II) are cis/trans forms of the same 1,4-structure, they are geometrical isomers (Statement A is correct).

Since (III) differs in the connectivity position (1,3 vs. 1,4), it forms position isomers with both (I) and (II) (Statements B and D are correct).