<prompt> True about Tanner stage 3,Penis increases in lengthPenis increases in widthScanty hair at the base of the penisDarkening of scrotum  <response>: Tanner staging of sexual maturity in boys STAGE 1 - Testicular volume 3mlprepubeal STAGE 2 - Reddening of scrotum, testicular volume reaching 4 ml, scanty hair at penile base. STAGE 3 - Increase in the length of penile shaft, fuher increase in testicular volume, pubic hair begins to curl and darken. STAGE 4 - Increase in the gih of penis and glans, Darkening of scrotum, Coarse abundant and curly pubic hair STAGE 5 - Adult size scrotum and penis, Adult type pubic hair spreading over to medial thighs. Ref: GHAI , 9th edition, Page 61. 