In an AC circuit, box may contain an inductor or a capacitor

The voltage across source is shown by given graph

Here $V_{box}$ versus time & $V_{resis\tan ce}$ versus time graphs are plotted. Choose the possible CORRECT alternative (s):

(i)  when box contains inductor, phasor diagram will be

Hence $V_L$ is leading with V of source, so A is not possible And $V_R$ is lagging behind V of source, So B is possible.

(ii) When box containr capacitor, phasor diagram will be

Hence $V_R$ is leading with V of source, So C is not possible And $V_C$ is lagging behind V, so D is also not possible.