U is the incenter , Option A is the correct answer.
What is an Incenter ?
An Incenter is the point at which all the angle bisector of the triangle meet.
A triangle RST is given , the line RU , SU ,TU bisect the angle R , S and T
The point at which all the angle bisector meet is called Incenter ,
Therefore U is the incenter , Option A is the correct answer.
To know more about Incenter
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