कोऽस्ति प्रधानो रसः शिवराजविजयस्य ?
English: वीरः is correct answer as per Sanskrit grammar rules and NCERT textbook explanation for CUET preparation. Hindi: वीरः सही उत्तर है जो संस्कृत व्याकरण और NCERT पाठ्यक्रम के अनुसार सही माना जाता है।
Ref: NCERT Sanskrit Class X Chapter Varnavichara explains swara vyanjana uchcharana sthana prayatna grammar rules clearly.