The correct answer is C. Cost audit.
A cost audit is an examination of the cost accounts and statements of a company to determine whether they are accurate and complete. It is a type of financial audit, but it focuses on the costs of a company’s operations rather than its overall financial position.
A complete audit is an examination of all of a company’s financial statements. It is the most comprehensive type of audit and is typically performed by external auditors.
An interim audit is an examination of a company’s financial statements at a point in time between regular audits. It is typically performed by internal auditors or external auditors.
An internal audit is an examination of a company’s financial statements and operations by its own employees. It is designed to identify and correct any problems with the company’s financial reporting or operations.