Final answer:
For men with classic CAH, the accurate symptom is hyperpigmentation due to increased ACTH production. Other symptoms such as menstrual irregularities, breast development, and androgen deficiency do not apply as these are not characteristics of classic CAH in men.
Step-by-step explanation:
The symptoms of classic congenital adrenal hyperplasia (CAH) in men greatly differ from those mentioned in the provided PCOS information (which relates to women). Classic CAH is a genetic disorder affecting the adrenal glands and leads to the production of excess androgens. The symptom listed as an option for men with classic CAH is hyperpigmentation.
Hyperpigmentation is a common symptom in classic CAH due to the overproduction of adrenocorticotropic hormone (ACTH) when the body attempts to stimulate the adrenal glands to produce cortisol. This increased ACTH also stimulates the production of melanin-forming cells, leading to darker skin pigmentation. Menstrual irregularities are not applicable to men, breast development would not typically occur as a result of CAH in men, and androgen deficiency is not characteristic of classic CAH, as it typically involves excess androgen.