Question

3. Which of the following is not a form of payment that can be used to make a purchase?
el cajero
en efectivo
la tarjeta de credito
el cheque personal* = think its this one

Answer 1

pretty sure el cajero means the cashier, so I would say a).
el cheque personal is a check. you can make a purchase with a check

Answer 2

I agree with @bigsby123, a cajero is a cashier.

Answer 3

yes, they are both correct :) efectivo means cash, tarjeta de credito means credit card and cheque personal means check and you can make payments with those 3, but you can't pay with a cashier :)