3. How many of the following statements is/are correct?
(I) The cis form of 1,3-dimethyI cyclohexane is more stable than the trans form.
(Il) In cyclohexane, the boat form conformer is more stable than the twist-boat forn.
(III) The 1,3-diaxal interaction in cyclohexane is mainly resulted from the torsional strain.
(A)0
(B)1
(C)2
(D) 3
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