<prompt> The enzyme 5a reductase mediated conversion of testosterone to di-hydro-testosterone is NOT required for which of the following actions?Formation of male external genitalia in the fetusProstatic hyperophy in elderly malesPubeal changes in the male adolescentSpermatogenesis  <response>: Testosterone is required for F - Feedback inhibition of LH secretion I - Internal genitalia development S - Spermatogenesis H- Hematopoiesis 