FIRST APPROACH: DRAW MST AND CHECK
SECOND APPROACH:
A-B,A-D,B-E ARE SELECTED USING KRUSKAL SO EDGES B-D AND D-E CANT BE SELECTED AS THEY WILL LEAD TO CYCLE. WE HAVE REMAINING 2 EDGES TO FULFILL MST CONDITION.
WE CAN SELECT 2 EDGES FROM BC,EF,CF,EC. SO 4C2 WAYS=6
BUT CHOOSING EDGES BC AND EC CAN LEAD TO CYCLE. SO TOTAL MST=6-1=5