Heat And Thermodynamics

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: If \(d Q\) and \(d W\) represent the heat supplied to the system and the work done on the system respectively. Then according to the first law of thermodynamics \(d Q=d U-d W\).

Reason R: First law of thermodynamics is based on law of conservation of energy.

In the light of the above statements, choose the correct answer from the options given below: