The first major extension of New Delhi outside of Lutyens' Delhi came in the 1950s when the Central Public Works Department (CPWD) developed a large area of land southwest of Lutyens' Delhi to create the diplomatic enclave of Chanakyapuri, where land was allotted for embassies, chanceries, high commissions and residences of ambassadors, around wide central vista, Shanti Path.
What organization developed land to expand New Delhi in the 1950s? (If the question is unanswerable, say "unanswerable")
the Central Public Works Department