Which of the following is true?

(A). The National Library of India follows two recommendations while purchasing books; Dr. V.S. Jha Committee recommendations  and Dr. Nihar Ranjan Roy Committee recommendations (1979) 

(B). Dr. Nihar Ranjan Roy Committee recommendations for book purchases; a History of Science and Technology; b, Science and Society

(C). According to Dr. V.S. Jha Committee recommendations, what types of publications are eligible for purchase are Books on India in any language

(D). The librarian has held the highest post of the National Library since 1977.