Compare an altitude and a median of a triangle

the altitude of a triangle is the height of the triangle and the median of a triangle intersects each side
the median of a triangle is the height of the triangle and the altitude of a triangle bisects each side
the altitude of a triangle is bisects each angle of the triangle and the median of a triangle bisects each side
the altitude of a triangle is the height of the triangle and the median of a triangle bisects each side

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.