Q.Contra Voucher is used for :

A contra voucher in Tally is meant for cash-and-bank transactions only (deposits and withdrawals between the two), which makes 'withdrawal of cash from bank for office use' the correct use — option (d).

In the Tamil Nadu HSC Commerce (Accountancy) syllabus, the Computerised Accounting System – Tally chapter classifies day-to-day entries into accounting vouchers, each with a fixed purpose:

• Contra voucher (F4) — used only when both the debit and credit are between cash and bank accounts, e.g. cash deposited into bank, cash withdrawn from bank, or a transfer between two bank accounts. No trading, income or expense element is involved.
• Payment voucher (F5) — payments made by cash or cheque.
• Receipt voucher (F6) — amounts received.
• Journal voucher (F7) — adjusting/non-cash entries. …