105. Burden of proving that case of accused comes within exceptions

When a person is accused of any offence, the burden of proving the existence of circumstances bringing the case within any of the general exceptions in the Penal Code, or within any special exception or proviso contained in any other part of the same Code, or in any law defining the offence, is upon him, and the court shall presume the absence of those circumstances.

A accused of murder alleges that by reason of unsoundness of mind he did not know the nature of the act.

A accused of murder alleges that by grave and sudden provocation he was deprived of the power of self-control.

Section 325 of the Penal Code provides that whoever, except in the case provided for by section 335, voluntarily causes grievous hurt shall be subject to certain punishments.