'सहकाराची तत्वे आणि कायदा' या पुस्तकात सहकाराची व्याख्या कोणी मांडली आहे ?

The correct answer is Option C (H. Calvert).

Key Points:
• The Law and Principles of Co-operation: This seminal book was authored by H. Calvert (Hugh Calvert), an ICS officer and registrar of co-operative societies in Punjab during the colonial era.
• Calvert's Classic Definition: He defined co-operation as: *"A form of organisation, wherein persons voluntarily associate together as human beings on a basis of equality, for the promotion of the economic interests of themselves."*
• Other Scholars in Co-operation:
• V.L. Mehta (Vaikunthbhai Mehta): Renowned as a stalwart of the Indian cooperative movement; the national apex institute VAMNICOM in Pune is named after him.
• Prof. Paul Lambert: Famous for authoring *Studies in the Social Philosophy of Co-operation*.
• Cooperative Tenets: Voluntary association, democratic management, and service rather than profit.
• Key Takeaway: H. Calvert authored 'The Law and Principles of Co-operation' and formulated one of the most famous definitions of co-operation.