दीर्घवृत्त ​​\(\rm\frac{x^2}{a^2}+\frac{y^2}{b^2}\) = 1 द्वारा परिबद्ध क्षेत्र किसके बराबर होगा?

1
π2ab
2
πab
3
πa2b
4
πab2

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