Which of the following instruments can be used for dc as well ac upto a few MHz?1. Moving iron instrument2. Thermocouple instrument3. Induction instrument4. Moving coil instrument Select the correct answer as per following codes

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