Statement $1$: When ultraviolet light is incident on a photocell, its stopping potential is $V_0$ and the maximum kinetic energy of photoelectrons is $K_{max}$. When $X$-rays are used instead of ultraviolet light, both $V_0$ and $K_{max}$ increase.
Statement $2$: Photoelectrons are emitted with a range of speeds from $0$ to a maximum value because the incident light contains a range of frequencies.

• A
  Statement-$1$ is true, Statement-$2$ is false.
• B
  Statement-$1$ is true, Statement-$2$ is true, Statement-$2$ is the correct explanation of Statement-$1$.
• C
  Statement-$1$ is true, Statement-$2$ is true, Statement-$2$ is not the correct explanation of Statement-$1$.
• D
  Statement-$1$ is false, Statement-$2$ is true.