Concept:
The Delivery of Books and Newspapers (Public Libraries) Act, 1954 is an important legislation in India related to the preservation of the country's published heritage.
Step 1:Purpose of the Act.
The Act requires publishers in India to deposit copies of every publication with designated national libraries.
Step 2:Objective of the law.
This ensures the systematic collection, preservation, and documentation of all published materials in the country.
Step 3:Conclusion.
Therefore, the main purpose of the Delivery of Books Act, 1954 is to ensure that copies of publications are deposited in national libraries for preservation and reference.
Hence, the correct answer is Option (B).