The value of plank's constant is : -

Question

( A ) $6.63\times10^{-34}kg-m^2$
( B ) $6.63\times10^{-34}kg-m\frac{2}{s}$
( C ) $6.63\times10^{-34}$
( D ) $6.63\times10^{-34}J-s^{-1}$