Which of the following is not a perfect square of an integer?
Pick one:  A) 64  B) 529  C) 441  D) 450  E) 484
A. 8*8=64   B.23*23=529   C.21*21=441   450.22*22=484   Here 450 is not a square of an integer   so answer is 450
<result>D</result>
Which of the following is not a perfect square of an integer?