sir/mam,i knew from wbssc prospectus that a 2-years diploma inelimentary education may be considerd in place of b.ed.is it right?

sir/mam,i knew from wbssc prospectus that a 2-years diploma inelimentary education may be considerd in place of b.ed.but u send me a mail that it's wrong.so plz saw west bengal ssc govt website & give me the answer that is it nesesery again to complete b.ed bcz ihave already completed d.el.ed.