Ravi claims that the polynomial p(x) = mx^a + x^2b has 4b zeroes. For Ravi’s claim to be correct, which of these must be true?​

(A) a= 2b or a = 4b
(B) a = 2 or a = 4b
(C) m = 2b
(D) m = 4b

Note Reliable Page 17 question number 2 has following change, “(A) a= 2 or a = 4″ has been changed to “(A) a= 2b or a = 4b”