Okay, let's tackle this question about congenital 17-hydroxylase deficiency causing hypertension. First, I need to recall what 17-hydroxylase does in the steroidogenesis pathway. This enzyme is part of the CYP17 family and is responsible for two main reactions: 17α-hydroxylation of pregnenolone and progesterone, and the 17,20-lyase activity that converts 17-hydroxypregnenolone and 17-hydroxyprogesterone to dehydroepiandrosterone (DHEA) and androstenedione, respectively.

So, if there's a deficiency in 17-hydroxylase, the pathways downstream of this enzyme would be affected. The key here is understanding which precursors accumulate and which hormones are not produced. The 17α-hydroxylation step is crucial for the synthesis of cortisol and sex steroids. If this step is blocked, cortisol production decreases, leading to increased ACTH due to negative feedback. High ACTH can stimulate the adrenal glands to produce more mineralocorticoids, like aldosterone, but how?

Wait, the question is about hypertension due to accumulation. Aldosterone causes sodium and water retention, leading to hypertension. But if 17-hydroxylase is deficient, the pathway for aldosterone synthesis isn't directly blocked. However, maybe there's an alternative pathway. Let me think. The 17-hydroxylase is also involved in the conversion of progesterone to 17-hydroxyprogesterone. Without this, progesterone might shunt into the mineralocorticoid pathway, leading to increased production of 11-deoxycorticosterone (DOC), which has mineralocorticoid activity. So, the accumulation of DOC would cause sodium retention and hypertension.

The options are not given, but the correct answer is likely 11-deoxycorticosterone. The other options might include cortisol precursors like 17-hydroxyprogesterone or other steroids. Let me check each possible wrong option. If the options had cortisol or aldosterone, those would be incorrect because cortisol is decreased, and aldosterone isn't directly accumulated. Instead, DOC is the key here. The clinical pearl is that 17-hydroxylase deficiency leads to hypertension due to mineralocorticoid excess from DOC, and hypokalemia, as well as sexual infantilism due to lack of sex steroids. So the answer is the accumulation of 11-deoxycorticosterone.

**Core Concept**
Congenital 17α-hydroxylase deficiency is an autosomal recessive disorder affecting steroidogenesis, leading to impaired cortisol and sex hormone synthesis. The enzyme **CYP17A1** (17α-hydroxylase) is critical for converting pregnenolone/progesterone to 17-hydroxypregnenolone/17-hydroxyprogesterone, which are precursors for cortisol, aldosterone, and sex steroids. Deficiency causes shunting of precursors toward mineralocorticoid synthesis.

**Why the Correct Answer is Right**
In 17α-hydroxylase deficiency, the block in cortisol synthesis reduces negative feedback on ACTH, increasing ACTH secretion.

✓ Correct Answer: A. Deoxycoicosterone