$\"\"$

The series is $\"\"$ .

The $\"\"$ partial sum is $\"\"$ .

First partial sum is $\"\"$ .

Second partial sum is $\"\"$ .

Third partial sum is $\"\"$ .

Observe the graphs:

The graph of option $\"\"$ is matched with the partial sums.

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

$\"\"$

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