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Mr Gupta asked two of his students to so...

Mr Gupta asked two of his students to solve the expression `((9a^(3)b^(-8))/(81a^(-5)b^(2)))^(-1/2)` and write the answer on the blackboard. Aryan wrote the answer as `3a^(-4)b^(5)` whereas Ayan wrote the answer as `(3b^(2))/a^(4)`. Who wrote the correct answer?

A

Aryan

B

Ayan

C

Both of them

D

None of these

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