A proton, an electron, a neutron and an alpha particle have the same energy. Their de Broglie's wavelengths are given below

(A) $λ_{\text{proton}}$
(B) $λ_{\text{electron}}$
(C) $λ_{\text{neutron}}$
(D) $λ_{\text{alpha}}$

Arrange these wavelengths in decreasing order.

Choose the correct answer from the options given below:

(B), (A), (C), (D)

The correct answer is Option (2) → (B), (A), (C), (D)

(B) $λ_{\text{electron}}$
(A) $λ_{\text{proton}}$
(C) $λ_{\text{neutron}}$
(D) $λ_{\text{alpha}}$