Step 1: Recall Rajasthan's main air hub.
Jaipur is the capital of Rajasthan and hosts the state's busiest airport, Jaipur International Airport at Sanganer.
Step 2: Identify the cargo facility.
This airport houses the Air Cargo Complex for Rajasthan, which handles freight movement, including gems, jewellery, textiles and perishable goods, in and out of the state.
Step 3: Note why Jaipur was chosen.
Jaipur has strong road and rail links to the rest of Rajasthan and to Delhi, which makes it the natural location for a centralised cargo hub.
Final Answer: Jaipur.