This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
The malleting force is directed: 
Select and explain. 
A. Perpendicular to the walls, B. Parallel to long axis of crown, C. 45° to the wall, D. None of the above
C: 45° to the wall
Answer: C: 45° to the wall 
Explanation: First, hand pressure compaction is used to secure the pellet against the compacted E-Z Gold and spread it over the surface; next, mallet compaction is used. Likewise, each succeeding pellet is hand compacted, and then is compacted with the mallet. The condenser point is systematically stepped over the gold twice as malleting proceeds. Generally, the line of force is perpendicular to the pulpal floor in the center of the mass and at a 45-degree angle to the pulpal floor as the external walls are reached. 
Ref: Sturdevant operative dentistry 7 ed page no e75