Answer: Titan is the largest moon of Saturn, and it orbits in a prograde orbit, not a retrograde orbit. Therefore, option b is the false statement.
Step-by-step explanation:
The false statement about planetary satellites is b. Titan, the largest satellite of Neptune, is the only large satellite in a retrograde orbit.
b. Titan is not a satellite of Neptune. It is actually the largest moon of Saturn. Additionally, Titan is not in a retrograde orbit. A retrograde orbit refers to an orbit in the opposite direction of the planet's rotation, but Titan orbits Saturn in the same direction as Saturn's rotation, making it a prograde satellite.