Name the line given in all possible (twelve) ways, choosing only two letters at atime from the four given.

Explanation

A series of points connected by a straight path is defined as a line. A line is usually defined by two points. A line has no thickness and can extend indefinitely in both directions.
The line can be named as,`" AB, AC, AD, BA, BC, BD, CA, CB, CD, DA, DB, and DC."`