What would be the middlemost digit in the smallest number that can be made using all the digitsof 8936217 ? 

Correct option is B

Let's determine the smallest number using all the digits 8, 9, 3, 6, 2, 1, 7 by arranging them in ascending order:

1 2 3 6 7 8 9

The middlemost digit in this 7-digit number is the 4th digit, which is 6.

Thus, the correct answer is (B) 6