Study Package for NTSE, 5e About the Author Stalin Malhotra- Former Director, Delhi Public School, Faridabad S.L. Gulati- Educational Consultant Prem Dhawan- HOD, Dept. of Chemistry, DPS, R.K.Puram Rachna Gupta- Vice Principal, DPS, Vasant Kunj Sanjeev Joon- Educational Consultant Vinay Kumar- Former Principal, DPS, Vasant Kunj.