Consider the following statements as regards noise1. If Gaussian noise is applied at input of a rectifier, the output is not gaussian2. The noise encountered on a telephone line consists of short, pulse type disturbances whose amplitude distribution is not Gaussian3. Shot noise results from random emission of electrons from a cathode4. Shot noise results from phenomenon associated with the flow of current across semi conductor junctions Which of the above are correct?

• A. 1, 2, 3, only
• B. 1, 2, 4 only
• C. 1, 2, 3, 4
• D. 2, 3 only