Dear Mehul,
You would have to stick to one option only i.e. whatever is being availed by you currently and cannot opt any other option during the financial year. It is why, we suggested you to please go through the Rule 6 of the CENVAT credit rule thoroughly/in details for better understanding.
Please refer explanation-I to sub rule 3 of the Rule 6 of the CENVAT credit Rules in this matter.
Explanation I
If the manufacturer of goods or the provider of output service, avails any of the option under this sub-rule, he shall exercise such option for all exempted goods manufactured by him or, as the case may be, all exempted services provided by him, and such option shall not be withdrawn during the remaining part of the financial year.
Regards,
YAGAY and SUN
(Management and Indirect Tax Consultants)