$\"\"$

Observe the graph :

As $\"\"$ tends to $\"\"$ from right hand side, the $\"\"$ approaches to $\"\"$ .

As $\"\"$ tends to $\"\"$ from left hand side, the $\"\"$ approaches to $\"\"$ .

Since the right hand side limit is equal to the left hand side limit, the limit exists. \ \

Therefore, the correct choice is option $\"\"$ .

$\"\"$

The correct choice is option $\"\"$ .