How many different positive integers exist between 10^2 and 10^3, the sum of whose digits is equal to 2?  Choose the correct choice from the following.
A) 3  B) 5  C) 6  D) 7  E) 8
101   110   200   total no. is 3   3
<result>A</result>
How many different positive integers exist between 10^2 and 10^3, the sum of whose digits is equal to 2?