Select the compound which does not have any diastereomer :

Question

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Compound (A) and (B): These contain two chiral centers; altering the configuration of one center generates their respective diastereomers.

Compound (C): This cumulene has an odd number of double bonds ( $3$ ), allowing it to show cis-trans geometrical isomerism (diastereomers).

Compound (D): This cumulene has an even number of double bonds ( $2$ ), placing terminal groups in perpendicular planes.

Conclusion: Compound (D) possesses molecular chirality and exists only as a pair of enantiomers, meaning it has no diastereomers.

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