Assertion (A):$\mathrm{Even} \times \mathrm{Even} \times ... \times \mathrm{Even}$ (Even number of times) is Even. 

Reason (R): Even number raised to any integral power gives Even number.

Assertion : $2\times 2\times 2\times 2=16$

$\therefore \mathrm{Even} \times \mathrm{Even} \times ...\times \mathrm{Even}$ (Even number of times) is Even. 

Reason: $2\times 2\times 2=2^3=8$ 

$\therefore$ Even number raised to any integral power gives Even number.