Statement (A):     $\mathrm{Odd}\times \mathrm{Odd}\times \mathrm{Odd}\times ....\times \mathrm{odd}$  (20 times) is odd 

Statement (B):     $\mathrm{Even}+\mathrm{Odd}+\mathrm{Even}+.... +\mathrm{Odd}$ (20 times) is even

I) The product of odd number either even or odd number of times is odd. 
II) The sum of even and odd of even number of times is even.