What is the diamagnetic susceptibility value among the following options?

Diamagnetic susceptibility values are typically negative and quite small in magnitude. This is due to the fundamental nature of diamagnetic materials, which are characterized by the fact that they create an opposing magnetic field when exposed to an external magnetic field, resulting in a weak repulsion.

The correct answer indicates a value of -9.8 x 10^-5, which aligns with the expected characteristics of diamagnetic materials. This negative value signifies that the material possesses diamagnetic properties since, in diamagnetism, the susceptibility is negative and indicates a repulsion to the magnetic field.

The other options exhibit values that either do not reflect the typical behavior of diamagnetic substances or are incorrectly positive or overwhelmingly large for diamagnetic susceptibility. For example, options with larger magnitudes or positive values suggest paramagnetic or ferromagnetic characteristics, which contradict the diamagnetic behavior that we are concerned with in this question.