What does it take to be the best mother in the world? Is giving birth enough? Maybe not! The life of Shakuntala Devi was way beyond mathematics, it was also about her relationship with her daughter. Vidya Balan plays the titular character and Sanya Malhotra her daughter.

The makers have unveiled the new song, Paheli, and it seems to be an ode to all the mothers in the world and how they will go the extra mile to be the best mothers in the world. The song begins with Shakuntala Devi declaring that she would be the best mother ever, and then we see montages of her tender and endearing relationship with her daughter.