At room temperature,solid paraffin is:

$CH_3-CH_2-CH_2-CH_3 \xrightarrow{Br_2/hv}$
Major product in the above reaction is

The alkane from below having two secondary hydrogens is:

$2-$Methylbutane on reacting with bromine in the presence of sunlight gives mainly:

Assertion $(A)$: Cyclohexane is the most stable cycloalkane.
Reason $(R)$: Cyclopropane and cyclobutane are less stable due to angle strain and torsional strain.
The correct answer is

The reaction of $1, 3-$dibromopropane with metallic zinc gives ..........