Determine which of the given alcohols 2-methylhexan-3-ol, 3-methylpentan-3-ol, 3,3-dimethylpentan-2-ol, 2-methyl-2-phenylpropan-1-ol, 3-methylpentan-3-ol, 2-methylhexan-3-ol undergoes dehydration upon heating with concentrated sulphuric acid without carbocation rearrangement?