Which of the following statements are true concerning the adult mandible?
1. The mandibular foramen lies in the centre of the mandibular ramus both in the vertical and horizontal planes.
2. The angle formed by the junction of the ramus and the body of the mandible is an acute one.
3. The genial tubercles are attachments for the anterior bellies of the digastric muscles.
4. The temporalis muscle attaches to the lateral surface of the coronoid process.

(1) and (4)

(1) and (2)

(1) and (3)

(1) (3) (4)