Assertion (A): a transformer is used to increase or decrease ac voltage only.
Reason (R): a transformer works on the basis of mutual induction.
O Both Assertion (A) and reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
O Both Assertion (A) and reason (R) are true, but reason (R) is not the correct explanation of assertion (A)
O Assertion (A) is true, but reason (R) is false
O Assertion (A) is false, but reason (R) is true