Concept:Primogeniture is a rule of inheritance where the firstborn son gets the entire estate.
Explanation:The word comes from Latin, meaning "first born."
Under this system, only the eldest son inherits the father's property.
Other children receive nothing.
This was common in many medieval European kingdoms.
In Indian history, the Mughals did not follow primogeniture.
They used coparcenary inheritance, where property was divided among all sons.
That system led to family conflicts and rebellions.
So primogeniture is the opposite: one son inherits everything.
Answer:Option A: The eldest son inherits his father's estate.