Which of the following statements are correct for an ideal constant voltage source?1. Its output voltage remains absolutely constant whatever the change in load current.2. It possesses zero internal resistance so that internal voltage drop in the source is zero.3. Output voltage is provided by the source would remain constant irrespective of the amount of current drawn from it.4. Output voltage provided by the source varies with the amount of current drawn from it.

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