I. Proper Noun: A proper noun is the specific name of a particular person, place, or thing. It always begins with a capital letter.
Sentence A has a proper noun → A. Shri Rama killed Ravana. ("Shri Rama" and "Ravana" are specific names of people.)

II. Collective Noun: A collective noun refers to a group of individuals considered as a single unit.
Sentence B has a collective noun → B. The jury found the prisoner guilty. ("Jury" is a group acting as one.)

III. Abstract Noun: An abstract noun names a quality, idea, or state that cannot be perceived by the senses.
Sentence C has an abstract noun → C. Honesty is the best policy. ("Honesty" is a quality, not a tangible thing.)

IV. Common Noun: A common noun refers to a general name for a person, place, or thing, not specific.
Sentence D has a common noun → D. Cow gives us milk. ("Cow" is a general name for an animal.)

Therefore, the correct answer is Option C) A-IV, B-III, C-I, D-II