Task: Question Answering
Input (English): Question: How many four-digit positive integers can be formed by using the digits from 1 to 9 so that two digits are equal to each other and the remaining two are also equal to each other but different from the other two ?

 Option A: 400

 Option B: 1728

 Option C: 108

 Option D: 216

 Option E: 432
Output (English): Option D