Which of the following chair conformations re | vedclass

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(A) $1$. For $(1S, 2S, 4R)-1,2,4$-trimethylcyclohexane, the substituents at positions $1, 2,$ and $4$ have specific stereochemical orientations.$2$. I

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(A) $1$. For $(1S, 2S, 4R)-1,2,4$-trimethylcyclohexane, the substituents at positions $1, 2,$ and $4$ have specific stereochemical orientations.$2$. In the $(1S, 2S, 4R)$ isomer, the methyl groups at $C1$ and $C2$ are $cis$ to each other (both $UP$ or both $DOWN$), and the methyl group at $C4$ is $trans$ to the methyl group at $C1$.$3$. To minimize $1,3$-diaxial interactions, substituents prefer the equatorial position. The most stable chair conformation is the one that places the maximum number of bulky methyl groups in equatorial positions.$4$. For this specific isomer, the most stable chair conformation has two methyl groups in equatorial positions and one methyl group in an axial position (specifically, equatorial at $C1$, axial at $C2$, and equatorial at $C4$).$5$. Upon analyzing the provided structures, option $(A)$ represents a conformation that is rotationally equivalent to the lowest-energy state, but the question contains multiple identical structures ($A$, $B$, and $D$ are rotationally equivalent representations of the same conformation). Therefore, the question is invalid as multiple options represent the same lowest-energy conformation.

Which of the following chair conformations represents the lowest-energy form of $(1S, 2S, 4R)-1,2,4$-trimethylcyclohexane?

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