Step 1: The adrenal cortex is divided into three layers:
- Zona glomerulosa (outermost) produces mineralocorticoids.
- Zona fasciculata (middle layer) produces glucocorticoids, such as cortisol.
- Zona reticularis (innermost) produces sex hormones.
Step 2:
- (A) Zona reticularis produces sex hormones, not glucocorticoids.
- (B) Zona glomerulosa produces mineralocorticoids.
- (D) The medulla is the inner part of the adrenal gland, responsible for producing catecholamines.
Conclusion: The middle layer of the adrenal cortex is the zona fasciculata.