C. 13 / 13
ExplanationStep 1: Use modulus formula |a+ib| = √(a²+b²). Step 2: √((-5)²+12²)=√169=13. Step 3: Signs become positive after squaring.
Step 1: Modulus formula |a+ib| = √(a²+b²) लगाएं। Step 2: √((-5)²+12²)=√169=13। Step 3: Sign square होने पर positive हो जाता है।
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