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Two complex numbers are equal when their real parts match and their:

ASigns must differ
BArguments must differ
CImaginary parts match
DModuli must differ
Answer & Solution
Correct answer: C. Imaginary parts match
1. Equality has to hold for both components at once. 2. The real parts must agree first. 3. The imaginary parts must agree as well. _Source: syllabus Mathematics, Chapter 5, Complex Numbers and Quadratic Equations._
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