Investigation of a joint stock company is 

The audit which involves the examination of cost accounts and also the costing systems and techniques called 

The particular Audit compulsory under any statute or act is called

Auditing is an examination of the books, accounts and vouchers of a business and enable the auditor to satisfy on his responsibility - Definition given by

Who will fix the interest rate for debentures

The process of comparing the entries in the books of accounts with the bonafide vouchers is called