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: Social & Preventive Medicine
Commonest among diseases with Mendelian inheritance is – 
Select and explain. 
A. Autosomal dominant, B. Autosomal recessive, C. X–linked recessive, D. X–dominant
A: Autosomal dominant
Answer: A: Autosomal dominant 
Explanation: It is estimated that the combined incidence of mendelian inheritance (autosomal dominant, autosomal recessive, x-linked) in man is about 1% of all live born individuals.
As many as 793 autosornal dominant phenotypes, 629 autosomal recessive traits and 123 sex linked diseases have been catalogued to date.