**Core Concept**
Spermatogenesis is a complex process of male germ cell development, involving the maturation of spermatogonia into mature spermatozoa. This process is tightly regulated by a feedback loop involving the hypothalamic-pituitary-gonadal axis.

**Why the Correct Answer is Right**
Luteinizing hormone (LH) plays a crucial role in spermatogenesis by stimulating the Leydig cells in the testes to produce testosterone. Testosterone, in turn, promotes the development and maturation of sperm cells. LH also stimulates the Sertoli cells to produce androgen-binding protein (ABP), which is essential for sperm maturation. The increase in LH secretion is triggered by the negative feedback of testosterone on the hypothalamus and pituitary gland.

**Why Each Wrong Option is Incorrect**
**Option A:** Inhibin is produced by Sertoli cells and inhibits FSH secretion, but it does not directly control spermatogenesis.

**Option B:** FSH is essential for spermatogenesis, but it primarily regulates the Sertoli cells, which support and nourish the developing sperm cells. LH, however, is the primary regulator of testosterone production.

**Option D:** GnRH stimulates the pituitary gland to release LH and FSH, but it does not directly control spermatogenesis.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that LH surge is responsible for the release of testosterone, which in turn promotes spermatogenesis. This process is sensitive to feedback regulation by testosterone, making LH a critical regulator of spermatogenesis.

**Correct Answer:**
✓ Correct Answer: C. LH