An electron in hydrogen atom will only emit energy when it jumps from higher energy level to a lower energy level. Order of energy change i.e. emition of energy is follows: n2→n1>n3→n2>n4→n3> n5→n4>n6→n5⋅s⋅s Hence, among the given options, maximum energy emitted by an electron during its transition from n3→n2.