<prompt> Maximum growth spurt in boys occurs at:8-10 years10-11 years12-13 years14-15 years  <response>: d. 14-15 yearsRef: Nelsons 20e p 84-89, Ghai 8e p 13-14Height velocity curves for males solid line and females dashed line showing maximum growth velocity in:Boys at 14-15 yrsGirls at 11-13 yrs 