Consider the following statements about a moving iron instrument1. It is an unpolarised instrument.2. It has permanent magnet.3. It has a fixed coil.4. It has two iron vanes. Of these statements

• A. 1, 2, 3 are correct
• B. 1, 2, 4 are correct
• C. 1, 3 and 4 are correct
• D. 2, 3, 4 are correct