According to Bohr’s atomic theory:
(A) Kinetic energy of electron is \( \propto \dfrac{Z^2}{n^2} \).
(B) The product of velocity \( (v) \) of electron and principal quantum number \( (n) \), ‘\( vn \)’ \( \propto Z^2 \).
(C) Frequency of revolution of electron in an orbit is \( \propto \dfrac{Z^3}{n^3} \).
(D) Coulombic force of attraction on the electron is \( \propto \dfrac{Z^3}{n^4} \).
Choose the most appropriate answer from the options given below:
