{(a - b)/ab} + {(b - c)/bc} + {(c - a)/ca} এর মান কত?

B 1

C a

D b

Correct Answer: Option A

{(a - b)/ab} + {(b - c)/bc} + {(c - a)/ca}
= ‍(ac - bc + ab - ac + bc - ab)/abc
= 0/abc
= 0