जे शब्द आपल्या मनातील वृत्ती किंवा भावना व्यक्त करतात त्यांना ________ असे म्हणतात.

The correct answer is Option D (केवलप्रयोगी).

Key Points:
• The key concept is understanding undeclinable words (Avyaya) that express sudden emotions.
• Interjections (Kevalprayogee Avyaya) are words that spontaneously express emotions like joy, sorrow, surprise, or approval.
• Examples include: 'Ababa!' (Surprise), 'Arecha!' (Shock), 'Shabash!' (Appreciation).
• These words are independent and do not have a grammatical connection with the rest of the sentence.
• Key Takeaway: Interjections (Kevalprayogi) express sudden human emotions and feelings.