Answer
The conductor is charged negatively.
Work Step by Step
The positively charged ball is brought close to a conductor.
Electrons will then flow through the ground connection onto the conductor because the electrons are negatively charged and they are attracted to the positively charged ball.
If the ground connection is then removed, the electrons stay on the conductor.
When the positively charged ball is then taken away, the electrons remain on the conductor.
Therefore, the conductor is charged negatively.