Which of the following is not a mixture of hydrocarbons?

The end product $(P)$ of the following reaction is:

The conversion of cyclohexene to $HO-(CH_2)_6-OH$ can be achieved by:

What is the major product of the following reaction?
(Image of trans$-1,2-$dibromocyclohexane reacting with $NaNH_2$)

Consider the following reactions:
$(a)$ $CH_3-CH=CH_2 + HBr \rightarrow CH_3-CH(Br)-CH_3$
$(b)$ $CH_3-CH=CH_2 + HBr \xrightarrow{Peroxide} CH_3-CH_2-CH_2Br$
$(c)$ $CH_4 + Cl_2 \xrightarrow{hv} CH_3Cl + HCl$
Which of these reactions proceed via a free radical mechanism?

The major product $[C]$ of the following reaction sequence will be