An even and an odd integer are multiplied together. Which of the following numbers could not be the square of their product?	Options.
A) 16
B) 36
C) 49
D) 144
E) 196
49 = 7^2 so it can not be the square of an even number multiplied by an odd number.   The answer is 49.
<result>C</result>
An even and an odd integer are multiplied together. Which of the following numbers could not be the square of their product?