<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 56-year-old man presents seeking treatment for his baldness. He says he has noticed a bald patch in the center of his head which has increased in size over the past year. Physical examination and diagnostic tests show no evidence of an infectious cause. The patient is prescribed a drug be taken daily. After 4 months, the patient returns for follow-up and says that his hair growth has increased significantly. He denies any significant side effects except for a slight decrease in his sex drive. Which of the following is most likely the mechanism of action of the drug this patient was prescribed?? A: 5α reductase inhibitor, B: Androgen receptor blocker, C: GnRH analog, D: α1 adrenergic antagonist, E: Androgen receptor activation,  <response>: This is a clinical vignette describing a 56-year-old man with male pattern baldness that has been progressive over the past year. He was prescribed a medication that after 4 months resulted in increased hair growth but also caused a slight decrease in libido. The question asks about the most likely mechanism of action of the prescribed drug. Based on the clinical history of male pattern baldness responsive to the medication, as well as the side effect of decreased libido, the drug is most likely targeting either androgens or the androgen receptor pathway.A: 5α reductase inhibitor 