Explanation:

- Option 1: Apex Bank of the country

- The central bank is indeed the apex bank, meaning it sits at the top of the banking hierarchy and oversees all the banking operations in the nation.

- Option 2: Ownership of the Government

- Central banks are typically owned by the government. This allows them to align with national economic policies and operate in the public interest.

- Option 3: Regulates the entire banking system in the country

- Central banks regulate and supervise the banking system to maintain financial stability and ensure sound banking practices.

- Option 4: All of the above

- All the above statements collectively describe key functions and characteristics of a central bank.