1 . $ax+by=a^2; bx-ay=ab;$ এই সহ-সমীকরণের (x,y) এর সমাধান কোনটি?

• A. $\left(a^2,b^2\right)$
• B. $\left(a,b\right)$
• C. $\left(0,a\right)$
• D. $\left(a,0\right)$

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Answer: Option D

Explanation: