An orthocenter is the intersection of three
Altitudes in a triangle.
The explanation for the correct answer:
Option (B):
An altitude is a line segment that starts at a vertex and runs perpendicular to the line segment opposite that vertex.
Hence, option (B) is correct.
The explanation for incorrect options:
Option (A):
An orthocenter is not the intersection of three angle bisectors in a triangle.
Therefore, option (A) is incorrect.
Option (C):
An orthocenter is not the medians in a triangle.
Therefore, option (C) is incorrect.
Option (D):
An orthocenter is not a perpendicular bisector in a triangle.
Therefore, option (D) is incorrect.
Therefore, the correct option is an option (B).