The specific surface of spherical particles is given by (where D and ρ are diameter and density of particle) ?
A. 6/D.ρ
B. 2/D.ρ
C. 4/D.ρ
D. 12/D.ρ
A. 6/D.ρ
B. 2/D.ρ
C. 4/D.ρ
D. 12/D.ρ