<prompt> Protective levels of Tetanus anti-toxin is:0.01 IUmL0.5 IUmL1.0 IUmL5 IUmL  <response>: a. 0.01IUmLRef: Nelsons 20e p 1381, Ghai 8e p 193-194Protective titer for diphtheria 0.1IUmL and for tetanus 0.01IUmL. 