What type of crystal defect is indicated in the diagram given below
`{:(Na^(o+),Cl^(ɵ),Na^(o+),Cl^(ɵ),Na^(o+),Cl^(ɵ)),(Cl^(ɵ),square,Cl^(ɵ),Na^(o+), square, Cl^(ɵ)),(Na^(o+),Cl^(ɵ),square,Cl^(ɵ),Na^(o+),Cl^(ɵ)),(Cl^(ɵ),Na^(o+),Cl^(ɵ),Na^(o+),square,Na^(o+)):}`
A. Frenkel and Schottky defects
B. Schottky defect
C. Interstitial defect
D. Frenkel defect
`{:(Na^(o+),Cl^(ɵ),Na^(o+),Cl^(ɵ),Na^(o+),Cl^(ɵ)),(Cl^(ɵ),square,Cl^(ɵ),Na^(o+), square, Cl^(ɵ)),(Na^(o+),Cl^(ɵ),square,Cl^(ɵ),Na^(o+),Cl^(ɵ)),(Cl^(ɵ),Na^(o+),Cl^(ɵ),Na^(o+),square,Na^(o+)):}`
A. Frenkel and Schottky defects
B. Schottky defect
C. Interstitial defect
D. Frenkel defect
Correct Answer – B
These defect are produced when one `+ve` and one `-ve` ion are missing from their respective position removed.