I am facing south. I turn 900 in the anti-clockwise direction and walk 30 m and then Turing north I walk 40 m and then turning west I go 60 m. Then turning left walk 80 m. How far am I from the starting point ?

Question

( A ) 50 m
( B ) 40 m
( C ) ) 30 m
( D ) 210 m