If $P$ represents radiation pressure, c represents speed of light and $\mathrm{Q}$ represents radiation energy striking a unit area per second, the non-zero integers $x, y$ and $z$ such that $P^{x} Q^{y} c^{z}$ is dimensionless, are.

• A

  $x=1, y=1, z=-1$
• Correct answer
  B

  $x=1, y=-1, z=1$
• C

  $\quad x=-1, y=1, z=1$
• D

  $x=1, y=1, z=1$

Hence, the correct answer is option: 'B'.