What is the value of C.O.P. of high-temperature cascade system in terms of intermediate temperature in the following diagram?If TEL and TCL = Evaporator and condenser temperatures for low-temperature cascade systemTEH and TCH = Evaporator and condenser temperatures for high-temperature cascade system

• A. TEH / TCH – TCH
• B. TI / TCH – TI
• C. TCH / TI – TCH
• D. TEH / TI – TCH