The answer is B.
Explanation:
The other options contain K, L, or Mg which are all metals.
Gamma is not affected by both fields because it isnt charged.
Only alpha and beta ray will be affected because they are charged with positive and negative ions respectively.
In otherwords, <span>Gamma rays are high-energy photons of light, which have zero electric charge. So they are not affected by magnetic fields</span>
Here's a chart. .
If that doesnt help tell me :)
A mosses don’t have seeds