Question:`a^m xx a^n = a^(m +n)`হলে- i. `a^5 xx a^n = a^11` ii. `a^8 xx a^9 = a^17` iii. `a^7 xx a^9 = a^16` নিচের কোনটি সঠিক ? 

A i ও ii 

B i ও iii 

C ii ও iii 

D i, ii ও iii 

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