Male external genitalia do not develop
a. in the presence of an x chromosome.
b. without androgen secretion by the fetal testes
c. without prior regression of the mullerian ducts
d. if wolffian ducts develop.
e. in the absence of estrogen in the fetus.

The correct answer is option B.  Without androgen secretion by the fetal testes

Explanation:

Androgen secretion by the fetal testis is important for male external genitalia development or sexual differentiation. Testosterone especially has a major role in the development of the testes, prostate and other cells and tissue responsible for the development of the reproductive organs and external genitalia.

Androgen mainly testosterone is metabolized and DHT is required for androgen-induced development of the external genitalia.

Thus, the correct answer is option B. Without androgen secretion by the fetal testes.

explanation:

for example, code 28039 - excision, tumor, soft tissue of foot or toe, subcutaneous, 1.5 cm or greater, appears before 28043 - excision, tumor, soft tissue of foot or toe, subcutaneous; less than 1.5 cm.