破伤风抗毒素皮试液为A.0.1mL含20U～50UB.0.1mL含15UC.0.1mL含25UD.0.1mL含50μgE.0.1mL含0.75mg

破伤风抗毒素皮试液为

A.0.1mL含20U～50U

B.0.1mL含15U

C.0.1mL含25U

D.0.1mL含50μg

E.0.1mL含0.75mg

请帮忙给出正确答案和分析，谢谢！