1. 
1  + 1 + 1 = ?
1 + x(b - a) + x(c - a) 1 + x(a - b) + x(c - b) 1 + x(b - c) + x(a - c)

A. 0
B. 1
C. x(a - b - c)
D. None of these

Answer: Option B

Explanation: