Since you have someone with limited mobility, we suggest you take a look at the Maruti Suzuki Wagon R with the swivel seat option. The Wagon R’s height gives you a very natural entry and exit into the cabin, and the swivel seat makes this even easier. The boot should also hold a folded wheelchair in the upright position without the parcel tray in place.
The swivel seat option is currently available in 11 cities, so check with your dealer if they can arrange this for you.