If 1 = 1, 2 = 3,3 = 5 and 4 = 7, then 5 = ?

Answer : Option A

Explanation :

1 $\Rightarrow$ 2 $\times$ 1- 1 = 1 2 $\Rightarrow$ 2 $\times$ 2 - 1 = 3 3 $\Rightarrow$ 3 $\times$ 2- 1 = 5 4 $\Rightarrow$ 4 $\times$ 2- 1 = 7 5 $\Rightarrow$ 5 $\times$ 2- 1 = 9

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