Match the following steps in the sex differentiation process with the correct description:
| A. Activation of SRY gene | I. Leads to regression of Müllerian ducts |
| B. Upregulation of SOX9 | II. Initiates male sex differentiation |
| C. Secretion of Anti-Müllerian Hormone (AMH) | III. Promotes differentiation of Sertoli cells |
| D. Production of testosterone | IV. Drives development of male secondary sexual characteristics |
1
A-I, B-II, C-III, D-IV
2
A-II, B-III, C-IV, D-I
3
A-II, B-III, C-I, D-IV
4
A-IV, B-III, C-II, D-I