A particle of mass m, is confined in a two-dimensional infinite square well potential
of side a. The eigen-energy of the particle in a given state is
E=(25*(π^2)*(ℏ^2))/ma^2
. The state is
(A) 4-fold degenerate (B) 3-fold degenerate
(C) 2-fold degenerate (D) Non-degenerate
please explain in detail
