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: Pharmacology
Which of the following is NOT true about adrenergic receptors 
Select and explain. 
A. α1 receptors are usually presynaptic, B. β1 receptors are predominantly found in heart, C. Noradrenaline stimulates β1  receptors, D. α2 receptor stimulation inhibits transmitter release
A: α1 receptors are usually presynaptic
Answer: A: α1 receptors are usually presynaptic 
Explanation: Presynaptic sympathetic receptors are usually α2. Other statements are true