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Match List-I (Type of Hygrometer) with List-II (Related Process/Material) and select the correct answer using the code given below the lists:
List-I
A. Resistive hygrometer
B. Capacitive hygrometer
C. Microwave refract meter
D. Crystal hygrometerList - II
1. Quartz crystal
2. Lithium chloride crystal
3. Change in dielectric constant
4. Change in frequency of oscillator
b. A→4, B→1, C→2, D→3
c. A→2, B→1, C→4, D→3
d. A→4, B→3, C→2, D→1
asked in Electronics Paper-1, 2006
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