This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Triple test for diagnosis of Down's syndrome includes all of the following except – 
Select and explain. 
A. β–HCG, B. α–Fetoprotein, C. Serum HPL level, D. Serum oestriol level
C: Serum HPL level
Answer: C: Serum HPL level 
Explanation: Triple test is a combined biochemical test which includes → MSAFP, HCG, & Oestriol

In an affected pregnancy  
level of MSAFP is decreased
level of oestriol is decreased
the level of hCG is High (increased)