Absorption/scattering cross-section of an element is expressed in "barn", which is equivalent to
A
10<sup>-24</sup> cm<sup>2</sup>
B
10<sup>-12</sup> cm
C
1 Angstrom
D
10<sup>-24</sup> cm
Correct Answer: 10<sup>-24</sup> cm<sup>2</sup>