Function key to select purchase voucher is A. F8 B. F9 C. F4 D. F3

The correct answer is C. F4.

The function key F4 is used to select purchase voucher in many accounting software programs. For example, in QuickBooks, pressing F4 will open the Purchase Voucher window. In Sage 50, pressing F4 will open the Purchase Order window.

The other options are incorrect. F8 is used to insert a comment in QuickBooks, F9 is used to recalculate a formula in Excel, and F3 is used to open the Find and Replace dialog box in Word.