The Hyundai Creta Electric is the most practical, sensible, and most sorted EV out of the options listed. It is practical, spacious, and it drives well too. Moreover, it is very efficient, hence you can expect over 400km of range without trying too hard. Since you are looking at a long-term buy, it is the Hyundai's ownership experience that's likely to be fuss-free.

The Tata Nexon EV 45's real-world range isn't likely to be as good as the Creta Electric's. The Mahindra BE 6 is the most radical option with excellent performance, battery and range. However, its user-experience is simply too complicated, its ergonomics are flawed, and backseat space isn't as good as the others.

Short-term resale values of EVs are not as good as those of ICE cars. However, since you are likely to hold on to your car for 10 years, resale should be the least of your concerns. 

For your daily running, an electric car will do just fine, assuming you can charge your car at home, your place or work. For your highway family trips too, it will do just fine if they are about 250 to 300 kms. However, any more than that or if the route involves lots of hills, then you will need to top up. You will need to plan your travel accordingly to make sure there are sufficient chargers on your route, as they can be occupied or even not working at times. 

With your Rs 15 lakh budget, you should consider the Tata Nexon EV Long Range version. Furthermore, the Nexon will also satisfy your requirement of safety as it is very well equipped and secured a 5-star BNCAP crash rating. 

For your daily running of 100kms, an EV will do just fine, but you will have to charge it daily or at least every alternate day. Thus, we would recommend this only if you have access to reliable charging at either your home or place of work. Since you are looking for an SUV body style, you can consider buying the Tata Nexon EV or the recently unveiled electric Mahindra XUV3XO. 

If charging is an issue, a CNG would be a better choice; the CNG Brezza is a good performer. Do bear in mind that the CNG tank does eat into the boot space. 

If you would like to have a usable boot, then consider the Nexon CNG. It has dual CNG tanks below the floor, thus leaving you with an open and very usable boot. 

Since there is only a Tata Motors service centre in your town of Bardhaman, you should go for a Tata Motors EV, and there are plenty of options. 

In your budget, the Tata Nexon EV is your best all-around option. It is a proven product and offers a good mix of space, comfort, features and range. Its electric motor is smooth and powerful, and comfort is excellent thanks to well-calibrated suspension. It should be a good EV option for you.

You can go ahead with the Nexon EV. We suggest you go for the Nexon EV. Your average daily driving is around 40km, so an MR variant should satisfy your everyday needs. You must know two key points: Tata Motors after sales service is a bit patchy, though they are working on improving it. The Nexon EV charging is slow, even with a fast charger, so you will have to plan your charging on long routes.