Answer:
Jupiter
Explanation
gravitational force depends on the mass of the body. Gravitational force is directly proportional to the the mass of body.
We know that gravitational force act on a satellite of mass m orbiting 100km above the surface is given by the following formula

Here,
G is universal gravitational constant
m-mass of satellite
M- Mass of celestial body which pull the satellite
r- distance between satellite and celestial body
Gravitational force will be maximum when M will be maximum
we know that Jupiter is the largest planet and it has the largest mass hence Jupiter will have the strongest gravitational pull on a satellite orbiting 100 km above its surface