The correct option is (c) - 3 only.
[as per provisional answerkey]The passage explicitly contrasts "selfish Zamindars" with Rai Sahib, who "still held to the old values." It states that because of these values, he felt a landlord must look after his tenants. This directly supports Conclusion 3: that landlords who adhere to traditional values (the "old values") tend to be more concerned about the welfare of their tenants (in this case, providing grazing land). The logical link between "old values" and "looking after tenants" is clearly established in the final sentence of the text.
Passage-based inference requires distinguishing between specific character traits described in the text and broad generalizations or external factual knowledge not supported by the narrative.