| a. | the age at puberty is defined as the age at menarche | |
| b. | breast development is almost always in evidence at the age of twelve years | |
| c. | the
average age at menarche is 13 years in the
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| d. | failure to menstruate by the age of 15 should be fully investigated | |
| e. | every fetus will develop female external genitalia unless exposed to the effect of testosterone |
| Answer |