Doubt from LCR

How to check Option Q for A,B,C,D

option A is easy one put Va=Vosin(wt) and Vb=0
option B Vab will not be in same phase due C1
Option C Vab will not be in same phase due to L1
Option D Vab will be in same phase as R1 will not change the phase

In ans key Q matches with A only

Did you gave this jee advance paper 1 19-01-2020?

No

Okay,I think for T/2 it will be in same phase due to R1
And for next T/2 its phase differences will be 90 due to C1

If you can share the question paper then share it. @darshil_2020

Is it valid to share latest paper on public websites(In addition ,I'm not an allen classroom student) ?
If you do not mind then I can share you the paper on whatsapp,fb or any other private mode?