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Which one is a solution set of x < 4 (when x ε W)?

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 < 4 (when x ε W)

Option A):
{1,2}
Option B):
{1,2,3,4}
Option C):
{0,1,2,3,4}
Option D):
{0,1,2,3}

Correct Answer is Option D):
{0,1,2,3}