troubleshooting Question

"NaN" in Java

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techbroFlag for United States of America asked on
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I am taking a java mock exam in my exam simulator - enthuware. I am studying for a certification exam. I have approached this problem about "NaN", which I am not familiar with.

The Question is:

Which of the following statements about NaNs are true ?
A. Float.NaN == Float.NaN
B. Float.NaN == Double.NaN
C. Float.NaN >= 0
D. Float.NaN < 0
E. None of the above.

Here, Option E is the correct answer according to the exam simulator.

Since NaN means "Not a Number", it is obvious that C and D are incorrect. But I need to know why option A is not correct in this problem?
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