Up to what temperature the water is heated in solar water heater

Options :
  1. 20 degree C
  2. 50 degree C
  3. 80 degree C
  4. 100 degree C
Answer and Explanation :-

Answer: Option 3


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[Some scientific] experiments.tell us that what we consider the objective world depends in some measure on our own conscious processes. There is no fixed eternal reality... true understanding is not to be achieved with the rational mind. Larry Dossey, Space, Time