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
Mechanism of Mianserin 
Select and explain. 
A. Inhibitis α - adrenergic, H1 & some type of 5 - HT receptors, B. Inhibits α - adrenergic, H2 & some type of 5-HT receptors, C. Inhibitis β - adrenergic, H1 & some type of 5 - HT receptors, D. Inhibits α adrenergic & H1 receptors.
A: Inhibitis α - adrenergic, H1 & some type of 5 - HT receptors
Answer: A: Inhibitis α - adrenergic, H1 & some type of 5 - HT receptors 
Explanation: Mianserin is an atypical antidepressant that acts by inhibiting α - adrenergic, H1 & certain serotonin receptors.