If solar energy Qr is available at a reservoir storage temperature of Tr and if quantity of heat Qa is transferred by the solar collector at temperature Ta, then which of the following is true?a) first law efficiency = Qa/Qrb) second law efficiency = exergy output / exergy inputc) second law efficiency = (first law efficiency)*(1-To/T

• A. first law efficiency = Qa/Qr
• B. second law efficiency = exergy output / exergy input
• C. second law efficiency = (first law efficiency)*(1-To/Ta)/(1-To/Tr)
• D. all of the mentioned