Correct Answer: Sea : Ship : Captain

Solution : Given:
Track: Train : Driver (This depicts the relation between the path on which the mode of transport runs and the person who operates the mode of transport)

Let's check each option –
First option: Road : Bus : Conductor; A bus runs on a road but the conductor doesn't drive the bus.
Second option: Sea: Ship: Captain; The sea is the place where a ship sails and a captain has command and control of the navigation, cargo handling, storage, and safe handling of the ship.
Third option: Sky: Pilot: Airhostess; All three words are not interrelated with each other.
Fourth option: Field: Athlete: Pole; A field is a place where an athlete plays whereas a pole is situated in the field.

So, only the second option follows the same pattern as followed by the given pair. Hence, the second option is correct.