ANSWER
The correct answer is option A
Step-by-step explanation
The orthocenter is the point of intersection of all the altitudes of the triangle.
The altitudes are the vertical height of the triangle.
The altitudes emanate from one vertex of the triangle and meet the opposite side at right angles.
From the given diagrams, option A is the correct answer, because it has all the altitudes intersecting at a common point called the orthocenter.