**Core Concept**
Hirsutism is a clinical condition characterized by excessive growth of hair in women, particularly in areas typically associated with male pattern hair growth. This condition is often due to an excess of androgens, which can be caused by a variety of factors including hormonal imbalances, genetic disorders, or medications.

**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of hirsutism, which involves an excess of androgens such as testosterone. The enzyme 17α-hydroxylase is involved in the production of cortisol and sex steroids from cholesterol. A deficiency in this enzyme leads to an overproduction of mineralocorticoids and a decrease in the production of cortisol and sex steroids, including androgens. This results in a relative excess of androgens, leading to hirsutism.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe a common cause of hirsutism. While some medications may cause hirsutism as a side effect, this is not a primary cause.
**Option B:** This option is incorrect because it does not accurately describe the pathophysiology of hirsutism. While insulin resistance is a common feature of polycystic ovary syndrome (PCOS), it is not a direct cause of hirsutism.
**Option C:** This option is incorrect because it does not accurately describe a common cause of hirsutism. While some genetic disorders may be associated with hirsutism, this is not a primary cause.

**Clinical Pearl / High-Yield Fact**
One important point to remember is that hirsutism can be caused by a variety of factors, including hormonal imbalances, genetic disorders, and medications. A thorough medical history and physical examination are essential in determining the underlying cause of hirsutism.

**Correct Answer: D. 17α-hydroxylase deficiency**