Which of the following can be the range of input impedance of voltmeter?

• A. less than 1‚Äö√Ñ√∂‚àö√´¬¨‚àÇ
• B. Between 1‚Äö√Ñ√∂‚àö√´¬¨‚àÇ and 10‚Äö√Ñ√∂‚àö√´¬¨‚àÇ
• C. Very high
• D. unpredictable