Measurement of non-electrical quantity involves the following subsystems 1. Amplifier block2. Display block3. Instrumentation block4. Transducer block The correct sequence of these blocks is

• A. 4, 1, 3, 2
• B. 4, 3, 1, 2
• C. 1, 3, 2, 4
• D. 1, 2, 3, 4