of final decision of the suit. Likewise the defendant could not say while accepting the costs that he would challenge the order in appeal or revision or that he would return the costs withdrawn if the order of amendment of plaint is set aside. The crux of the matter to be seen is as to what the petitioner did and not what he said. By acceptance of costs, he accepted the order as correct. He has taken benefit of the order. He cannot now turn around and say he will also challenge the order. By allowing him to challenge the order would amount to nullifying the effect of acceptance of costs. In such circumstances, he cannot approbate and reprobate. His own act would estop him. At the most it can be said that the petitioner had two options, one to accept the costs and to treat the order as correct, the other not to accept the costs, he exercised his choice in accepting the order as correct. His lodging the protest in such circumstances in meaningless. Reference here may be made to the decision of Madras High Court in R. Samudra Vijyam Chettiar v. Srinivasa Alwar, AIR 1956 Madras 301 laying down the following principle :-