B. 13 / 13
ExplanationStep 1: Use modulus formula |a+ib| = √(a²+b²). Step 2: √(12²+5²)=√169=13. Step 3: Modulus is found like distance.
Step 1: Modulus formula |a+ib| = √(a²+b²) लगाएं। Step 2: √(12²+5²)=√169=13। Step 3: Modulus distance की तरह निकाला जाता है।
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