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Which one is a solution set of √x = - 3?

10th Class Federal Board Exams Quizzes MCQs Quizzes Federal Board Class 10th Math Chapter No 1

Question:
Which one is a solution set of √x =  - 3?

Option A):
{  }
Option B):
{-3}
Option C):
{ 9}
Option D):
{ 3}

Correct Answer is Option A):
{  }