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: Anatomy
Nodal and lefty2 gene is associated with: 
Select and explain. 
A. Cardiac looping, B. Intestinal loopin, C. Cardiac septation, D. None of the above
A: Cardiac looping
Answer: A: Cardiac looping 
Explanation: Cardiac looping is dependent in pa upon the laterality-inducing genes nodal and lefty2 Ref: Langman's embryology 11th edition Chapter 12.