B. 11 / 11
ExplanationStep 1: Standard circle form is x² + y² = r². Step 2: r² = 121 so r = 11. Step 3: Square root of the right side is radius.
Step 1: Standard circle form x² + y² = r² है। Step 2: r² = 121 इसलिए r = 11। Step 3: Right side का square root radius होता है।
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