We first note the relationship between "prehistoric" and "medieval."
"Prehistoric" refers to the time before recorded history, while "medieval" refers to a later historical period after ancient history. Thus, the relationship is chronological progression from an earlier era to a later era.
Examining options:
- Option (a) "Akbar : British" — Akbar is an individual ruler from the Mughal period, and British refers to a colonial power; this is not a consistent chronological era-to-era relationship.
- Option (b) "present : future" — the present precedes the future in time, perfectly mirroring the chronological earlier-to-later pattern in the original pair.
- Option (c) "Shakespeare : Tennyson" — both are poets from different eras, but this is not a general chronological term-to-term relationship; it’s more about individuals.
- Option (d) "colossus : elephant" — refers to size comparison, not chronology.
Thus, "present : future" is the most accurate analogy.