Consider the following statements regarding the behavior of dislocations:1) Only edge dislocation and mixed dislocation can have glide motion.2) A screw dislocation cannot have glide motion.3) Dislocation moves in the direction perpendicular to that of shear stress.4) The motion of dislocation occurs on a slip plane that contains Burger’s vector and a direction vector.Which of the above statements are correct?

• A. 1, 2 and 3 only
• B. 1, 2 and 4 only
• C. 2, 3 and 4 only
• D. 1, 2, 3 and 4