A probability density function is given by $$P\left( x \right) = K\exp \left( { - \frac{{{x^2}}}{2}} \right),\, - \infty < x < \infty $$
The value of K should be

A. True B. False

A. Space diversity B. Frequency diversity C. Broad band antenna D. Directional antenna

A. A double-tuned amplifier B. A high gain D.C. amplifier C. A cathode follower stage D. None of the above

A. Filter method B. Phase cancellation method C. Good attenuation characteristics D. All of the above