Correct Option: B

F1 = 0 (since both the input have same value i.e.,
A ⊕ A = AA + AA = 0)
F2 = A (since F1 ⊕ A ⇒ 0 ⊕ A = 0A + A0 = A
F3 = 0 (since F2 ⊕ A ⇒ A ⊕ A = AA + AA = 0
Hence alternative (B) is the correct answer.