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

The logic here is

Along the columns

15$$^2$$ - 8$$^2$$ = 225 - 64 = 161

18$$^2$$ - 9$$^2$$ = 324 - 81 = 243

The difference of squares of first two numbers is equal to the third number along the columns.

Let the missing number = a

Similarly,

a$$^2$$ - 12$$^2$$ = 432

$$\Rightarrow$$  a$$^2$$ - 144 = 432

$$\Rightarrow$$  a$$^2$$ = 576

$$\Rightarrow$$  a = 24

$$\therefore\ $$The missing number = 24

Hence, the correct answer is Option B