Correctness of Logical Statements

Consider the following three statements :
(A) If 3 + 3 = 7 then 4 + 3 = 8.
(B) If 5 + 3 = 8 then earth is flat.
(C) If both (A) and (B) are true then 5 + 6 = 17.
Then, which of the following statements is correct ?