"12. The only other question which needs to be considered, is the alleged exercise of right of private defence. Section 96, IPC provides that nothing is an offence which is done in the exercise of the right of private defence. The Section does not define the expression right of private defence'. It merely indicates that nothing is an offence which is done in the exercise of such right. Whether in a particular set of circumstances, a person legitimately acted in the exercise of the right of private defence is a question of fact to be determined on the facts and circumstances of each case. No test in the abstract for determining such a question can be laid down. In determining this question of fact, the Court must consider all the surrounding circumstances. It is not necessary for the accused to plead in so many words that he acted in self-defence. If the circumstances show that the right of private defence was legitimately exercised, it is open to the Court to consider such a plea. In a given case the Court can consider it even if the accused has not taken it, if the same is available to be considered from the material on record. Under Section 105 of the Indian Evidence Act, 1872 (in Short the burden Evidence Act'), the burden of proof is on the accused, who sets up the plea of self-defence, and, in the absence of proof, it is not possible for the Court to presume the truth of the plea of self-defence. The Court shall presume the absence of such circumstances. It is for the accused to place necessary material on record either by himself adducing positive evidence or by eliciting necessary facts from the witnesses examined for the prosecution. An accused taking the plea of the right of private defence is not necessarily required to call evidence; he can establish his plea by reference to circumstances transpiring from the prosecution evidence itself. The question in such a case would be a question of assessing the true effect of the prosecution evidence, and not a question of the accused discharging any burden. Where the right of private defence is