Chemistry - STEREO ISOMERISM Question with Solution | TestHub

For 'cis as well as E', the molecule needs cis geometry AND a C=C with E configuration. Option A: the two CH3 groups are on opposite sides (trans); CIP priorities I > CH3 and Br > CH3 are also opposite (E) - it is trans + E, not cis + E. Option B: one alkene carbon carries two identical HOOC groups, so E/Z is not possible. Option C: the two propenyl substituents on the ring are cis, and each CH=CH double bond has the ring and CH3 on opposite sides (E). So C has both cis and E. Correct. Option D: a single acyclic double bond; cis/trans and E/Z coincide, and as drawn it is trans (E) - it cannot be cis and E at once. Answer: Option C.