Answer
The correct option is d
Work Step by Step
$\frac{(P + an^2)}{(V^2)} (V - nb) = nRT$
Real gas will behave like ideal gas when $'a'$ and $'b'$ are minimum or zero.
==> At high temperature the kinetic energy of the gas molecules increases and they move farther from each other.
==> Low pressure ensures low intermolecular interactions among the molecules. Thus High temperature and Low pressure are favourable.
The correct option is d