Which of the following is not a veritable source of funds to a public limited company?

The option that is not a veritable source of funds to a public limited company is "government financial grant". Government financial grant is a non-repayable fund given to support specific activities or projects of a company, but it is not a reliable or sustainable source of funds for a public limited company. The other options listed: advances and loan from banks, internally generated funds, and funds from the sale of shares are more reliable and sustainable sources of funds for a public limited company. Advances and loans from banks are usually obtained with an agreement to repay with interest. Internally generated funds come from the company's operations and profits, and funds from the sale of shares come from selling ownership shares to investors.