The Kia Syros is an option worth considering. It's got an amazingly roomy cabin, good boot space and ample ground clearance for our road conditions. It packs in ample safety features and there's comfort in knowing that its a 5 star Bharat NCAP rated vehicle. The 1-litre turbo-petrol HTK Plus is within your budget and gets some key features such as a crisp 12.3-inch touchscreen. 

Other options you could look at include the Mahindra XUV 3XO in AX5 trim (though the boot isn't largest), Maruti Suzuki Brezza ZXI (a well rounded package) and Nissan Magnite Turbo (service network isn't very widespread).  

For the family, the Kia Syros DCT is the most appropriate simply because the Syros has the most spacious cabin. The rear seats in particular are comfortable, offering more headroom and legroom than the Kia Sonet and Skoda Kylaq. 

The Syros is also superbly equipped, feels quite premium and has a large boot. The only issue is that the Syros pricing is a bit too high for a sub-4 metre SUV and not the best value. 

Since your usage is limited, the premium you will pay for a CNG or diesel version over the turbo-petrol might not make sense. Hence, stick to their turbo-petrol versions only. Both, the Mahindra XUV 3XO and Skoda Kylaq are great options, with strong engines, a comfortable ride and confident handling. 

The XUV 3XO is more spacious, while the Kylaq has a bigger boot. The Kia Syros is an excellent, well-rounded car, too, but its entry-level variant, which is decently equipped otherwise, doesn't get a sunroof. 

Hence, since you want a sunroof, within Rs 12 lakhs, the Mahindra XUV 3XO AX5 is the one for you.

The Kia Syros is a great option for you due to its spacious cabin and backseats, which recline for more comfort. Furthermore, its boxy design enhances the sense of space inside this cabin. Another good, spacious option is the Citroen Aircross X, which is a large car for compact SUV money. If you have a Citroen showroom near you, it is worth considering.
 

The Citroen Aircross X AT is a good SUV with a crucial USP being the extra set of seats in the third row. It isn't a 7-seater but more of a 5+2, which means the third row is good enough for kids and short adults for quick city drives. 

You can also remove the seats entirely and use the space as a big boot. The turbo-petrol engine is responsive and nice to drive, the ride is extremely comfortable, and it has a decent feature list too. If you want maximum practicality, the Aircross X is a good choice. 

The other option worth looking at would be the Kia Syros. The Syros has an unconventional design, but is excellent when it comes to space and packaging. It also has a higher level of quality throughout the cabin. Sure, it does not have an extra set of seats, but it has a spacious rear seat that gets ventilation for the base and a good degree of recline, too. 

Also, Kia's network is more widespread than that of Citroen, and that does help when it comes to after-sales and service.  

Considering your requirements, the Kia Syros fits the bill and will offer everything you need in one package. 

The petrol engine has enough grunt for daily city driving, and the DCT gearbox is easy to use, especially if you’re not expecting high performance. The drive modes also help it adapt better on highways. It has the roomiest cabin among the SUVs you’ve mentioned.

The rear seat with the recline function is very comfortable. The panoramic sunroof brings in a lot of light and makes the cabin feel more open. The features and equipment list are excellent, and the overall build quality is very impressive.

The only area where it may fall slightly short is fuel efficiency, though the difference isn’t much.

Overall, it’s a fantastic package and works as a great all-in-one car.