Correct option is A
In this question the following logic is followed-
Sum of diagonal – subtraction of diagonal = upper number
(1 + 1) – (1 – 1) = 2
2 – 0 = 2
2 = 2
And
(2 + 5) – (9 – 8) = 6
7 – 1 = 6
6 = 6
Similarly,
(? + 3) – (10 – 9) = 8
(? + 3) – 1 = 8
(? + 3) = 9
? = 9 – 3
? = 6
Correct answer is (a) 6.







