Since you are a family of 5 adults and one infant, we would recommend a three-row SUV. In that way, everyone can be buckled up in their own seat, including your child, with the ISOFIX child seat that you have.
We would thus recommend the recently launched Mahindra XUV 7XO. The XUV is also very safe and stable on highways. With your budget of Rs 25 lakh, you will get a version equipped with ventilated seats and a sunroof.
Depending on the amount of driving that you do, you can opt for either the petrol or diesel engine; both deliver well on performance and refinement.