Step 1: Background.
The Land Development Banks in India were originally called Land Mortgage Banks. Their primary purpose was to provide long-term finance to farmers for land development, agriculture, and allied activities.
Step 2: Change of name.
Later, they were renamed Land Development Banks to reflect their extended role beyond mortgages.
Step 3: Eliminate options.
(A) Regional Rural Bank: Established much later (1975).
(B) Cooperative Bank: General cooperative institutions, not the same.
(D) NABARD: Established in 1982, apex body, but not the earlier name.
Step 4: Conclusion.
Correct answer: (C) Land Mortgage Bank.