Which of the following statement about tumor markers is correct?

1.	Which of the following statement about tumor markers is correct?
A.	Carcino-embryonic antigen (CEA) is a tumor-specific marker in colorectal cancer.
B.	CEA is mainly used for determining prognosis and detecting relapse.
C.	Human chorionic gonadotrophin (hCG) cannot be used to screen gestational trophoblastic disease in patients with molar pregnancy.
D.	Raised hCG in peri-menopausal and post-menopausal women is always abnormal.
E.	Phantom hCG is detected in gestational trophoblastic disease.
Answer» C. Human chorionic gonadotrophin (hCG) cannot be used to screen gestational trophoblastic disease in patients with molar pregnancy.

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Which of the following statement about tumor markers is correct?

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