What is the output resistance of CC transistor?

• A. 25 ‚Äö√Ñ√∂‚àö√´¬¨‚àÇ
• B. 50 ‚Äö√Ñ√∂‚àö√´¬¨‚àÇ
• C. 100 ‚Äö√Ñ√∂‚àö√´¬¨‚àÇ
• D. 150 ‚Äö√Ñ√∂‚àö√´¬¨‚àÇ