Where a case is adjudicated under section 74 and order issued confirming tax demand and penalty, does the Noticee have any option to pay reduced penalty

Yes. The person served with order under section 74(9) along with a summary
electronically in Form GST DRC-07,shall pay the tax along with interest under section 50 and a penalty equivalent to 50% of such tax within 30 days of the communication of the order [Section 74(11)]. On such payment, all proceedings in respect of the said notice except for proceedings under section 132 shall be deemed to be concluded.

(ICAI FAQ PUBLICATIONS 06-09-2017 Determination of tax not paid or short paid or erroneously refunded or input tax credit wrongly availed or utilized by reason of fraud or any willful misstatement or suppression of facts: FAQ NO. 14)