2 × 10⁸ atoms of carbon are arranged side by side. Calculate the radius of the carbon atom if the length of this arrangement is 2.4 cm.

(a) 0.12 × 10⁻7 cm
(b) 1.2 × 10⁻7 cm
(c) 0.24 × 10⁻6 cm
(d) 0.024 × 10⁻6 cm