The carrier of genetic information is

What is the distance between two successive nitrogen base pairs in a $DNA$ double helix?

The successive histone octamers in a solenoid fibre are connected by . . . . . . .

Genetic information is carried by long-chain molecules made up of

$DNA$ is methylated at

$S$ Statement: $DNA$ is inherited by organisms produced by parents.
$R$ Reason: $DNA$ acts as a gene.
$(a)$ Both $S$ and $R$ are true,and $R$ is the correct explanation of $S$.
$(b)$ Both $S$ and $R$ are true,but $R$ is not the correct explanation of $S$.
$(c)$ $S$ is true and $R$ is false.
$(d)$ $S$ is false and $R$ is true.
$(e)$ Both $S$ and $R$ are false.