In case of a suit filed on basis of fraud, the period of limitation begins from?

As per The limitation act, 1963 S.17. Effect of fraud or mistake.—(1) Where, in the case of any suit or application for which a period of limitation is prescribed by this Act,— (a) the suit or application is based upon the fraud of the defendant or respondent or his agent; or (b) the knowledge of the right or title on which a suit or application is founded is concealed by the fraud of any such person as aforesaid; or (c) the suit or application is for relief from the consequences of a mistake; or (d) where any document necessary to establish the right of the plaintiff or applicant has been fraudulently concealed from him , the period of limitation shall not begin to run until the plaintiff or applicant has discovered the fraud or the mistake or could, with reasonable diligence, have discovered it;