5(none)
Now,
(1) + (2) + (4) + (5) = 85 (BANG)…..(i)
(2) + (3) + (5) + (6) = 20 (LUCK)…..(ii)
(4) + (5) + (6) + (7) = 30 (AHEAD)…(iii)
(1) + (2) + (3) + (4) + (5) + (6) + (7) = 100 – 5 = 95 …(iv)
(2) + (4) + (6) = 20 ….. (v)
Now
(i) + (ii) + (iii) – (iv) – (v) gives
2(5) = 135 – 95 – 20 = 20
(5) = 10
Option A is the Correct Answer.