In $DNA$ molecule,which of the following base pair is present?

The double-helical structure of $DNA$ proposed by Watson and Crick is known as:

Identify $A, B$ and $C$ in the given diagram:

Identify the correct features of $DNA$ from the following statements:
$(i)$ It is made of two polynucleotide chains.
(ii) The backbone is constituted by sugar and phosphate.
(iii) The two chains have anti-parallel polarity.
(iv) The bases in the two strands are linked through $H$-bonds.
$(v)$ Both chains are coiled in a right-handed fashion.

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

$RNA$ does not contain which of the following?