Match List-I (Equation) with List-II (Applicability or principle of equation) and select the correct answer using the codes given below the lists:
List- I
A. Thiem's equation
B. Dupit's assumption
C. Bernoulli's equation
D. Continuity equation
List - II
1. is based on energy conservation principle
2. is based on mass conservation principle
3. is applicable to steady flow towards a well in a confined aquifer.
4. is applicable to steady flow in an unconfined aquifer.