$A$ photon of $1.7 \times 10^{-13} \ J$ is absorbed by a material under special circumstances. The correct statement is:

If $c$ is the velocity of light in free space,the correct statements about photon among the following are:
$A$. The energy of a photon is $E=h v$.
$B$. The velocity of a photon is $c$.
$C$. The momentum of a photon,$p=\frac{h v}{c}$.
$D$. In a photon-electron collision,both total energy and total momentum are conserved.
$E$. Photon possesses positive charge.
Choose the correct answer from the options given below:

The fact that photons carry energy was established by

If $E$ and $P$ are the energy and the momentum of a photon respectively,then on reducing the wavelength of the photon:

Given below are two statements:
Statement-$I$: Two photons having equal linear momenta have equal wavelengths.
Statement-$II$: If the wavelength of a photon is decreased,then the momentum and energy of the photon will also decrease.
In the light of the above statements,choose the correct answer from the options given below.

Assertion: Mass of a moving photon varies inversely as the wavelength.
Reason: Energy of the particle $= \text{mass} \times (\text{speed of light})^2$