Which is not the ideal characteristic of an op-amp?

• A. Input Resistance ‚Äö√Ñ√∂‚àö√ë‚àö¬®> 0
• B. Output impedance ‚Äö√Ñ√∂‚àö√ë‚àö¬®> 0
• C. Bandwidth ‚Äö√Ñ√∂‚àö√ë‚àö¬®> ‚Äö√Ñ√∂‚àö‚Ć‚àö¬™
• D. Open loop voltage gain ‚Äö√Ñ√∂‚àö√ë‚àö¬®> ‚Äö√Ñ√∂‚àö‚Ć‚àö¬™