Theories cant become laws because they are just testable questions and opinions 
        
             
        
        
        
B is the correct answer to your question
        
             
        
        
        
The least reactive element in the third period is argon.
        
             
        
        
        
Answer:
I think this might be the answer
Explanation: The answer is the same for every diploid species. It is half the number of chromosomes in somatic (body) cells. The number of cells in gametes (sex cells) is n and the number in somatic cells is 2n. For fruit flies gametes have 4 chromosomes, for mice, 20, for humans 23, for chimpanzees 24. 
Hope this helps and stay safe.