Which of the following is/are side effects of rapid maxillary expansion?
1. increase in the vertical dimension.
2. mesial movement of the maxilla.
3. increase in the maxillary inter-molar width.
4. increase in the mandibular inter-molar width.

All of the above.

(4) only

(2) and (4)

(1) and (3)

(1) (2) (3)