Dual Nature of Radiation and Matter question for NEET / JEE Main, with solution

Answer: (B) the electron

Concept. Same $\lambda$ means same momentum; $K = \dfrac{p^2}{2m}$.

Step 1. Compare. Smaller mass, larger $K$: the electron.

Answer. The electron (Option B).

Solution by Sreeraj P, M.Sc Physics