If b−cab−ca + a+cba+cb + a−bca−bc = 1 and a - b + c ≠ 0 then which one of the following relations is true ?

• A. 1c=1a+1b1c=1a+1b1c=1a+1b1c=1a+1b1c=1a+1b1c=1a+1b1c=1a+1b1c=1a+1b1c1c11cc=1a1a11aa+1b1b11bb1c=1a+1b
• B. 1a=1b+1c1a=1b+1c1a=1b+1c1a=1b+1c1a=1b+1c1a=1b+1c1a=1b+1c1a=1b+1c1a1a11aa=1b1b11bb+1c1c11cc1a=1b+1c
• C. 1b=1a−1c1b=1a−1c1b=1a−1c1b=1a−1c1b=1a−1c1b=1a−1c1b=1a−1c1b=1a−1c1b1b11bb=1a1a11aa−1c1c11cc1b=1a−1c
• D. 1b=1a+1c1b=1a+1c1b=1a+1c1b=1a+1c1b=1a+1c1b=1a+1c1b=1a+1c1b=1a+1c1b1b11bb=1a1a11aa+1c1c11cc1b=1a+1c