‘A 4 B’ means ‘A is mother of B’, ‘A 6 B’ means ‘A is wife of B’, ‘A 8 B’ means ‘A is son of B’ and ‘A 2 B’ means ‘A is father of B’. Which of the following represents F as the grandson of V?
ΔABC is isosceles having AB = AC and ∠A = 40°. Bisectors PO and OQ of the exterior angles ∠ABD and ∠ACE formed by producing BC on both sides, meet at O. Then the value of ∠BOC is