The Tata Punch CNG would be a good option for you. The main advantage the Punch CNG has over the Maruti Suzuki Fronx and Brezza CNG is that you get a proper usable boot space. The CNG tanks in the Punch are placed under the boot floor, while they are in the boot in the Marutis. However if boot space isn’t a concern, its worth considering the Brezza as it has a roomier cabin and a smoother 1.5-litre engine.

