The correct options are
B 0.25
C 0.15
The apple is cut into 12 parts out of which he gave 5 to his friends.So he is left with 12 - 5 = 7 pieces.Out of this 7 pieces he eats 4 pieces. He is left with just 7- 4 = 3 pieces.
So he is left with :
312 = 14 = 0.25