Multiple choice

The isomerism, resulting from hindered rotation about single bonds, is

  1. atropisomers

  2. cis/trans- isomerism

  3. conformational isomerism

  4. optical isomerism

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A Correct answer
Explanation

Atropisomers are stereoisomers resulting from hindered rotation about single bonds where the steric strain barrier to rotation is high enough to allow for the isolation of the conformers.