This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
Bainbridge reflex is due to 
Select and explain. 
A. Stretching of atria, B. Baroreceptor reflex, C. Decreased venous return, D. Increased ventricular activity
A: Stretching of atria
Answer: A: Stretching of atria 
Explanation: Ref:- Guyton and Hall Textbook of Medical Physiology 13th ed; pg num:- 268