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# The reason for the double helical structure of DNA is the operation of

$\begin {array} {1 1} (A)\;\text{electrostatic interaction} & \quad (B)\;\text{vanderwalls forces} \\ (C)\;\text{dipole dipole interaction} & \quad (D)\;\text{Hydrogen bonding} \end {array}$

Hydrogen bonding is responsible for double helical structure of DNA
Ans : (D)