remarkable points and straight lines

A median is a line that connects the vertex of a triangle to the midpoint of the opposite side.

The three medians of a triangle converge at a point called centroid or geometric barycenter or center of mass. An altitude is a line through a vertex of a triangle and perpendicular to the opposite side.
The three altitudes of a triangle converge at a point called orthocenter. An angle bisector is a line through a vertex that cuts its angle in half. It is the geometric place of the points which are equidistant to both sides, too.
The three angle bisectors of a triangle converge at a point called incenter, the center of the triangle’s incircle. A perpendicular bisector is the line that cuts a side in half and it is perpendicular to it. It is the geometric place of the points which are equidistant to both vertices, too.
The three perpendicular bisectors of a triangle converge at a point called circumcenter, the center of the triangle’s circumcircle.  True-False Question

Decide if the following sentences are true or false:

a) The three angle bisectors converge at a point called circumcenter

True. False.

b) The orthocenter is the center of the incircle

True. False.

c) The three pependicular bisectors converge at a point called circumcenter

True. False.

d) The orthocenter can be out of the triangle

True. False.