A man starts from point ‘O’, travels 20 km towards East to reach point ‘A’, turns right and
travels 10 km to reach point‘B’, tums right and travels 9 km to reach point ‘C’, tums right and travels 5 km to reach point ‘D’, turns left and travels 12 km to reach point ‘E” and then turnsright andtravels 6 km to reach point ‘F’.
What is the shortest distance between his initial and final points?

A

$$ \sqrt{145} $$ 

B

13

C

$$ \sqrt{20}$$

D

$$ \sqrt{2}$$