Several of them are outside the normal range the Normal range is like 50 but if you could re-write the question I will help but I think 5th percentile is low so that's my best answer.
heya..
I'm an Indian...
I joined here to see what's different here..!!
Brain tumor, Parkinson's disease
The answer is A (Tar).
Tar appears on lungs when somebody smokes cigarettes.
I'm 100% correct, I've learned about this for years. Hope this helps!