Study the given pattern carefully and select the number that can replace the question mark (?) in it.

Figure I. 

=(8 × 4) – (10 + 12 )

=32 - 22

= 10 

Figure II. 

=(15×2 )- (9 + 16)

= 30 - 25 

= 5

Similarly;

Figure III. 

=(5 ×6)-(20 +2)

Thus, correct option is (b).