- Formal credit sources: These are government-regulated institutions that ensure fair lending.
- Commercial Banks and Government entities are formal sources because they adhere to legal procedures and offer equitable interest rates.
- Landlords and Money Lenders are informal sources, frequently imposing high interest rates without being subject to legal oversight.
Conclusion: The accurate response is \( \mathbf{(A)} \), since Commercial Banks and Government institutions function as formal credit sources.