Which of the following is not a base unit in the SI system?
SI has seven base units: m, kg, s, A, K, mol, cd. Newton is derived as kg·m/s² from F=ma. Hence it is not a base unit. Among options, Kelvin, Candela and Mole are base units, while Newton is derived, so Newton is correct as per NCERT.
Ref: NCERT Class 11 Physics > Chapter 2: Units and Measurements > Topic: SI Units and Dimensional Formulae