Question

For which of the compounds below are cis-trans isomers possible?
I. CH3 – CH = CH2
II. CH3 – CH = CH – CH2 – CH3
III. CH3 – CH = CH – CH3

A. I only C. both II and III
B. Both I and II D. all three
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Answer 1

Explanation:

Both 1 and 2 I think So it is option B