Among the following, ‘4’ is the unit’s place digit of  

A:Unit’s place digit of $2^{4k+2},k\in w=$ Unit’s place digit of $2{}^2=4$

B: Unit’s place digit of ${\text{4}}^{\text{odd}\text{number}}\text{=4}$

C: Unit’s place digit of ${\text{4}}^{\text{even}\text{number}}\text{=6}$

D: Unit’s place digit of $8^{4k+2},k\in w=$ Unit’s place digit of $8^2$ =unit’s place digit of $\text{64}=\text{4}$