The time period of the satellites used in TV signal transmission from one part of the world to another is:

Option 1 -> Geostationary satellites orbit with the same period as Earth's rotation, remaining fixed above a point on the equator.

Option 2 -> This period corresponds to semi-synchronous orbits used by some GPS satellites, not TV transmission satellites.

Option 3 -> This period is too long and not practical for communication satellites that need fixed positioning.

Option 4 -> This period is too short and would cause the satellite to move relative to ground stations.

Hence, Option 1: 24 hours -> TV transmission satellites are geostationary, orbiting at approximately 35,786 km above the equator with a 24-hour period, allowing them to maintain a fixed position relative to Earth's surface for continuous signal transmission -> correct