Pretend you are a teacher preparing a quiz for the text I will provide. 
            Each quiz question should follow the format below. 
            Ensure that you carefully recheck the questions and answers for accuracy. 
            The output should be a ready-to-use list of dictionaries for the Python eval function:

            [

                    "question": "WRITE THE QUESTION HERE",
                    "options": ["A) OPTION_1", "B) OPTION_2", "C) OPTION_3", "D) OPTION_4"],
                    "answer": INDEX_OF_CORRECT_ANSWER_IN_OPTIONS_LIST,
                    "explanation": "EXPLAIN WHY THE ANSWER IS CORRECT"

            ]

            Text:
            r carving. Fig (10). 
 
Fig. (10): Carver 
Amalgam carrier: - used to carry the amalgam and place into the prepared cavities. 
Fig (11). 
 
Fig. (11): Amalgam carrier 
Hand instrument grasping  
1. Pen grasp: - It is similar to that used in holding a pen. Pads of the thumb, index 
and middle fingers hold the instrument, while the tip of the ring finger, or tips of ring 
and little fingers, is placed on a nearby tooth surface of the same arch as arrest. The 
palm of the hand generally is facing away from the operator. 
2. Inverted pen grasp: - The finger position is the same as of pen grasp, but the hand 
is rotated so that the palm more toward the operator. This grasping is used mostly 
for preparing of upper teeth with indirect viewing technique. 
3. Palm and thumb grasp: - The handle of the instrument is placed in the palm of the 
hand and grasped by all fingers, while the thumb is free of the instrument and used 
for resting on a nearby tooth of the same arch 
Rotary instruments:-  
Handpiece:-  
Two basic types of handpiece: 
 - Straight handpiece: used for laboratory work 
- Contra angle handpiece: used in the mouth. 
The contra – angle handpiece are classified according to their speed of rotation into: 
- Low speed handpiece: have a free running speed range from 500 to 15,000 rpm 
(revolution per minute).  
- used for removal of carious dentin with round bur rotating slowly. 
 - used with different bur shapes to finish the prepared cavity (e.g. rounding of sharp 
edges, or flatting of the floor).  
- used in finishing and polishing of restorations.  
High speed handpiece: - have a free running speed above 160,000 rpm and some 
have speed up to 500,000 rpm.  
- Preferred for cutting enamel and dentin.  
- Penetration through enamel and extension of the cavities outline are more efficient 
at high speed. 
 - Small diameter burs should be used in the high speed handpiece. High speed 
generates considerable heat during cutting, even with small diameter burs and should 
be used with water coolant and high efficiency evacuation. 
 
Fig (12). Rotary instruments 
Burs:-  
A group of instruments that can turn on an axis with different speed of rotation to 
perform different types of work. 
 - Its work are either cutting, abrasive, finishing or polishing. 
 -Burs used for cutting are manufactured from different materials, which may be 
stainless steel, carbide or diamond.  
- The burs have hundreds of shapes and sizes. Parts of bur: fig 13. 
Shank: is the part that fit into the handpiece, accepts the rotation motion from 
handpiece, and which the bur is locked inside the handpiece head.  
Neck: is the part of the bur that connects the head to the shank. 
 Head: is the working part of the bur which contains the cutting edges or points. 
 
Fig (13). Burs parts 
Burs are classified according to the shapes of their heads. The basic bur shapes are: 
(fig 14). 
 Round bur: the head is spherical so it is used for initial entry into the tooth, 
preparation o

            Quiz: