Physics · UNITS AND MEASUREMENT

In the revised SI system (2018), the kilogram, kelvin, and ampere are defined by fixing the numerical values of which fundamental physical constants, respectively?

1. A
   Speed of light \( c \), Boltzmann constant \( k \), elementary charge \( e \)
2. B
   Planck constant \( h \), Boltzmann constant \( k \), elementary charge \( e \)
3. C
   Planck constant \( h \), Avogadro constant \( N_A \), caesium frequency \( \Delta \nu_{Cs} \)
4. D
   Elementary charge \( e \), Planck constant \( h \), Boltzmann constant \( k \)