(3) Kolkata Explanation: The Botanical Survey of India (BSI) is an institution set up by the Government of India in 1887 to survey the plant resources of the Indian empire. The Botanical Survey was formally instituted on 13 February. 1890 under the direction of Sir George King, who had been superintendent of Royal Botanic Garden, Calcutta since 1871. After India's independence, survey was drawn for the much-needed inventorisation of the country's rich floral resources, and Dr. E.K. Janaki Ammal was appointed Officer on Special Duty on 14 October, 1952. The reorganisation plan was finally approved by the Government of India on 29 March, 1954 with Calcutta as the headquarters of Botanical Survey of India.