When was the Department of Defence Supplies established?

The correct option is 1965.

The Department of Defence Supplies was created in November 1965. Its establishment was part of the restructuring efforts in India's defence administration following the 1965 war with Pakistan. The primary objective of setting up this department was to achieve self-reliance by promoting the indigenisation of defence equipment, stores, and spare parts that were previously imported. It was later merged with the Department of Defence Production to form the Department of Defence Production and Supplies.