The correct option is A 2√LC
We know that the angular frequency of oscillation of charge across the capacitor in the LC circuit, is ω=1√LC.
Also, the electrical energy oscillates with the double the angular frequency of oscillation of charge across the capacitor.
Therefore, the angular frequency of oscillation of electrical energy across the capacitor, is ω ′=2ω=2√LC.
Hence, option (A) is the correct answer.