Final answer:
The general ledger is not part of the finance function; it belongs to the accounting function. Cash receipts, portfolio management, and credit are all part of the finance function of a company.
Step-by-step explanation:
The activity that is not part of the finance function is d. general ledger. The general ledger is associated with the accounting function of a business, which involves recording and summarizing financial transactions, and is responsible for producing the company's financial statements.
On the other hand, activities such as a. cash receipts, b. portfolio management, and c. credit are directly linked to the finance function. Cash receipts involve tracking incoming money, portfolio management is related to handling investments, and credit is about managing the borrowing and lending of money.