The below table provides the thermos-emf sensitivity of five materials with reference to platinum around 273 K.MaterialConstantanNickelCopperIronNichromeSensitivity (μVK-1)-35-25+6+18.5+25Which one of the following thermocouple pairs has maximum sensitivity around 273 K?

The below table provides the thermos-emf sensitivity of five materials

1.	The below table provides the thermos-emf sensitivity of five materials with reference to platinum around 273 K.MaterialConstantanNickelCopperIronNichromeSensitivity (μVK-1)-35-25+6+18.5+25Which one of the following thermocouple pairs has maximum sensitivity around 273 K?
A.	Nichrome-constantan
B.	Copper-Nickel
C.	Platinum-constantan
D.	Nickel-constantan
Answer» B. Copper-Nickel