<prompt> Males and females show difference in the age of onset of pubey. The difference in the age of onset of pubey amongst males may be explained byIncreased Activin - A levelsDecreased Follistatin levelsIncreased Inhibin levelsEasily releasable FSH pool  <response>: One of several proteins that paicipate in differentiation and growth. Two glycoproteins, inhibin A and inhibin B, are secreted by Seoli cells in the testis and granulosa cells in the ovary, inhibiting FSH secretion by direct action on the pituitary.Ref: Ganong;s review of medical physiology; 24th edition; page no:-427 