Simplify: $45-[38-\{60÷3–(6-9÷3)÷3\left\}\right]$ .

The correct option is A $26$

Given : $45-[38-\{60÷3–(6-9÷3)÷3\left\}\right]$

$\Rightarrow$ $45-[38-\{60÷3–(6-3)÷3\left\}\right]$

$\Rightarrow$ $45-[38-\{60÷3–3÷3\left\}\right]$

$\Rightarrow$ $45-[38-\{20–1\left\}\right]$

$\Rightarrow$ $45-[38-19]$

$\Rightarrow$ $45-19$

$\Rightarrow$ $26$