B. 4 / 4
ExplanationStep 1: Standard form is x² + y² = r². Step 2: r² = 16 so r = 4. Step 3: The right side is the square of the radius.
Step 1: Standard form x² + y² = r² होती है। Step 2: r² = 16 इसलिए r = 4। Step 3: Right side radius का square होता है।
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