A patient selected for surgery who was induced with thiopentone

A patient selected for surgery who was induced with thiopentone i.v through one of the antecubital veins complains of severe pain of the whole hand. The next line of management is


a) give i.v propofol through the same needle  
b) give i.v ketamine through the same needle  
c) give i.v lignocaine through the same needle  
d) leave it alone


Ans (c)