Presumptive taxation involves which one of the following?

Correct option is A

Presumptive taxation involves the use of indirect methods to calculate tax liability, which differs from the usual sales based on the taxpayer's accounts. It is a method of taxation where the tax authorities make assumptions about the income of a taxpayer, based on certain presumptions such as the size of the business, the nature of the business, and the turnover of the business. This method is usually applied to small businesses or individuals who do not maintain proper accounts or records. The purpose of presumptive taxation is to simplify the tax system and to reduce the burden of compliance on small taxpayers.