A. 4
ExplanationStep 1: Conjugate of z is 2+5i. Step 2: z+conjugate z = (2-5i)+(2+5i)=4. Step 3: z plus its conjugate is always 2 times real part.
Step 1: Conjugate of z = 2+5i है। Step 2: z+conjugate z = (2-5i)+(2+5i)=4। Step 3: z+conjugate z हमेशा 2 real part होता है।
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