Study the given pattern carefully and select the number from among the given options that can replace the question mark (?).

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Logic: In the first diagram, (6 $$\times$$ 4) + 5 = 24 + 5 = 29

Similarly, in the second diagram, (8 $$\times$$ 5) + (?) = 48

$$\Rightarrow$$ 40 + (?) = 48

$$\Rightarrow$$​ (?) = 48 - 40 = 8​

So, 8 is the missing number.

Thus, the correct answer is (b).