Which list below contains only elements that are commonly found in living organisms?

The question given above is incomplete, below is the complete version:
Which list below contains only elements that are commonly found in living organisms?
A. He, P, N, Li
B. C, F, Ne, O
C. N, H, S, Ca
D. P, H, Be, Al

ANSWER
The correct option is C.
There are some elements that are commonly found in living organisms, these elements serve as building blocks for the materials found in living organisms. Examples of those elements are: carbon, nitrogen, hydrogen, oxygen, sulfur, phosphorus, sodium, calcium, etc.  

Icant be totally sure but i would say with confidence that it is example #1 about cells.