The most stableconformation of the compound(in which all methyl groups are cis to one anot...

The most stableconformation of the compound

(in which all methyl groups are cis to one another) has:

(a) All methyl groups axial

(b) All methyl groups equatorial

(c) Equatorial methyl groups at C-1 and C-2

(d) Equatorial methyl groups at C-1 and C-4

(e) Equatorial methyl groups at C-2 and C-4