In an LCR circuit as shown below both switches are open initially. Now switch S1 is closed, S2 kept open (q is charge on the capacitor and τ = RC is Capacitive time constant). Which of the following statement is correct? 
Work done by the battery is half of the energy dissipated in the resistor
At t = τ, q = CV/2
At t = 2τ, q = CV(1 – e–2)
At t = τ/2, q = CV(1 – e–1)