Which statement is always true?

  1. A cross section parallel to the base of a right rectangular prism is a square.

  2. A cross section perpendicular to the base of a right rectangular prism is congruent to the base.

  3. A cross section parallel to the base of a right rectangular prism is congruent to the base.

  4. A cross section perpendicular to the base of a right rectangular prism has the same dimensions as the base.