Question $1$

What is the output for the following code?

$```$

import numpy as np

arr $=$ np$.$array$([[1,2,3],[4,5,6],[7,8,9]])$

print$($np$.$ravel $($arr$))$

$[963852741]$

$[987654321]$

$[147258369]$

$[123456789]$

$```$