Final answer:
The Australian Securities and Investments Commission (ASIC) is the national regulator for consumer credit and consumer leases in Australia.
Step-by-step explanation:
The national regulator for consumer credit and consumer leases in Australia is the Australian Securities and Investments Commission (ASIC), which is Option 1. ASIC is an independent Australian government body that acts as Australia's corporate regulator. Its role is to enforce and regulate company and financial services laws to protect Australian consumers, investors, and creditors. ASIC's responsibilities include ensuring that financial markets are fair and transparent, and promoting informed participation by investors and consumers in the financial system.