A 7-year-old child presents to the paediatric clinic with ambiguous genitalia increasing with age.On examination her height, weight and blood pressure were recorded within normal limits.Labia appeared bifid with 2 separate perineal openings,phallic length was 2.5 cm and no palpable gonads were noted in the inguinal region.USG shows presence of mullerian structures.The most probable diagnosis is:

• A. Simple virilizing congential adrenal hyperplasia
• B. Classic Salt-Wasting 21 Hydroxylase deficiency
• C. 5-Alpha Reductase Deficiency
• D. Complete Androgen Insensitivity Syndrome