In a two -dimensional hexagonal close-packed layer.
(i) each sphere is surrounded by six sphere
(ii) each sphere is surrounded by six voids
(iii)each void is surrounded by three spheres
(iv) there are on an average two voids belonging to each sphere

Options

A. (i),(ii),(iii),(iv)
B. (i),(ii),(iii)
C. (i),(iii),(iv)
D. (ii),(iii),(iv)

Answer

1

Explanation

To form a two -dimensional close packed layer we place sphere in the cervies of the adjoining row: