![](https://dnte.hbcse.tifr.res.in/wp-content/uploads/2019/04/Covi-Sisters-Screenshot-from-2019-04-10-14-49-48.jpg)
NSD 2019: Science Characters titled Covi Sisters depicting the Covalent Bond. Idea by students of class 9, Aasfa Patel, Pratiksha Mohite, Prachi Khapurkar from Holy Cross Convent High School, Kalyan.
NSD 2019: Science Characters titled Covi Sisters depicting the Covalent Bond. Idea by students of class 9, Aasfa Patel, Pratiksha Mohite, Prachi Khapurkar from Holy Cross Convent High School, Kalyan.