Concept:A petrol voucher is a payment instrument used in place of money for a specific purpose, not an official currency.
Explanation:A petrol voucher is an example of token money.
It is a printed token that can be exchanged for petrol only.
It is not a bankdraft, because no bank instructs a payment of cash to another person.
It is not legal tender, because the law does not oblige anyone to accept it as a general medium of exchange.
It is also not partial money, since the correct classification among the options is token money.
Token money represents value but is limited in use and is not full legal currency.
Therefore, a petrol voucher is a token money instrument used for a particular transaction.
Answer:C. token money