Task: Question Answering
Input (English): Question: If p, q and r are positive integers and satisfy x = (p + q -r)/r = (p - q + r)/q = (q + r - p)/p, then the value of x is?

 Option A: -1

 Option B: 1

 Option C: 2

 Option D: -2

 Option E: -3
Output (English): Option B