If h is the Planck's constant, then the momentum of the photon having frequency $v$ is represented by

$hv/c$

The correct answer is Option (2) → $hv/c$

Energy of a photon: $E = h \nu$

Relativistic relation between energy and momentum for a photon: $E = pc$

So, momentum: $p = \frac{E}{c} = \frac{h \nu}{c}$

Final Answer: $p = \frac{h \nu}{c}$