Correct option: B.Maxwell provided the compelling theoretical evidence that light is transverse wave
b
In Huygen's principle the wave theory was established by assuming that the waves were longitudinal. So, option $(A)$ is wrong.
In Maxwell's theory of light, he stated that light is a transverse wave and conducted multiple experiments to prove so. So, option $(B)$ is correct.
Thomas Young conducted his double slit experiment and tried to prove the wave nature of light by proving that light undergoes interference which is a phenomenon showed by waves. He never proved the type of wave light is, i.e transverse or longitudinal. So, option $(C)$ is wrong.
These statements mostly highlight the wave nature of light. They do not comment on the particle nature of light or the dual nature of light established. Hence, they clearly do not answer the question "what is light" correctly. So, option $(D)$ is also wrong.
