Which of the following are/is acceptable types of tooth preparations to receive composite resins as restorative materials?
The design of the tooth preparation to receive a composite restoration may vary depending on several factors. Five designs of tooth preparations for composite restorations are presented here, and sometimes they willbe used in combination. 
The designs include:
(1) conventional
(2) beveled conventional
(3) modified
(4) box-only
(5) slot preparation designs
Conventional and bevelled conventional
Modified preparation where only the defect is removed
Box only or slot preparations
All of the above