MCQ
If A and B are two sets, then $ \text{A}\times\text{ B }=\text{ B}\times\text{A}$ If and only if:
- A$\text{A}\subset \text{ B}$
- B$\text{B}\subset\text{C}$
- ✓$\text{A}= \text{ B}$
- D$\text{None of the above} $
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