A 5 m ladder of mass 25 kg is placed in a position where its inclination to a vertical wall is at 30?. A 100 kg man is to climb the ladder. If the coefficient of static friction is 0.25 the height along ladder at which the slipping will be induced would be
A.0.5 m
B.0.8 m
C.1.2 m
D.1.6 m
E.2.4 m