In a pipe-flow pressure is to be measured at a particular cross-section using the most appropriate instrument. Match List I (Expected pressure range) with List II (Appropriate measuring device) and select the correct answer:
List I
A. Steady flow with small positive gauge pressure
B. Steady flow with small negative and positive gauge pressure
C. Steady flow with high gauge pressure
D. Unsteady flow with fluctuating pressure
List II
1. Bourdon pressure gauge
2. Pressure transducer
3. Simple piezo meter
4. U-tube manometer
A B C D
a. 3 2 1 4
b. 1 4 3 2
c. 3 4 1 2
d. 1 2 3 4