$$\overline{**45}$$, $$\overline{19*8}$$, $$\overline{23*1}$$, and $$\overline{3*49}$$ are four $4-$digit numbers with some unknown digits. Which number is possible to be a perfect square? 
选项为:A:$$\overline{**45}$$  B:$$\overline{19*8}$$  C:$$\overline{23*1}$$  D:$$\overline{3*49}$$  E:None  请回答其中一个选项.