Which of the following cannot be regarded as molecular solid?

(a) SiC (silicon carbide)

(b) AlN

(c) Diamond

(d) I2

The correct choice among the above is -

1. (a, b, c)

2. (b, c, d)

3. (a, c, d)

4. (a, b, d)

Hint: Diamond are examples of network solid 
 
SiC, AlN and diamond are examples of network solid as they have three dimensional structure while, I2 is a molecular solid,
 
because such solid particles are held together by dipole-dipole interactions.