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

​

In 1st figure:

$$\frac{9+4+2 }{5}$$ = 3

In 2nd figure:

​$$\frac{1+17+6}{8}$$ = 3

In 3rd figure:

​$$\frac{4+5+9}{?}$$ = 3

? =  6

Thus, the correct option (c)