This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Types of Genetic Disorders, Subject name: Pediatrics
Triple test includes all the following EXCEPT? 
Select and explain. 
A. AFP, B. HCG, C. Inhibin, D. Estradiol
C: Inhibin
Answer: C: Inhibin 
Explanation: Triple test includes: AFP HCG Estradiol Quadruple test: also include Inhibin All women are offered screening for Down syndrome in their 2nd trimester by means of 4 maternal serum tests (free b-human chorionic gonadotropin , unconjugated estriol, inhibin, and a-fetoprotein). This is known as the quad screen; it can detect up to 80% of Down syndrome pregnancies compared to 70% in the triple screen.