The Chief accounting officer of the federation is the Accountant General.
The Accountant General is the highest-ranking accounting officer in the country, responsible for managing the financial operations of the federal government. They are responsible for maintaining the central accounting records of the government, managing the payment of salaries, pensions and other entitlements, and ensuring compliance with financial regulations.
The Accountant General is responsible for preparing the financial statements of the government and coordinating the audit of the government's accounts by the Office of the Auditor General.
Therefore, the correct option is the Accountant General.