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: Pathology
Multifactorial inheritance is most likely to play a role in ? 
Select and explain. 
A. Cleft lip, B. Marfan's syndrome, C. Down's syndrome, D. Erythroblastosis fetalis
A: Cleft lip
Answer: A: Cleft lip 
Explanation: Ans. is 'a' i.e., Cleft lip Disorders with multifactorial inheritance The multifactorial disorders result from the combined actions of environmental influences and two or more mutant genes having additive effects. Multifactorial disorders are ? 1. Cleft lip/cleft palate 3. Coronary hea disease 5. Diabetes melitus 7. Pyloric stenosis 2. Congenital hea diseases 4. Hypeension 6. Gout