B. 12 / 12
ExplanationStep 1: Standard circle form is x² + y² = r². Step 2: r² = 144 so r = 12. Step 3: Square root of the right side gives radius.
Step 1: Standard circle form x² + y² = r² है। Step 2: r² = 144 इसलिए r = 12। Step 3: Right side का square root radius देता है।
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