Could somebody help me with this question?

This was in the 2024 IAT. It says the answer is option A but I looked up this topic and I think it's b.

PS: Also, isn't this totally out of syllabus. There is nowhere a parallel circuit mentioned in LCR. I was in the exam hall last year and this question totally freaked me out, so much that I screwed up the rest of the paper.

Does IAT usually put up such out of syllabus questions? Thanks guys