A small circular loop of radius $1\ \text{cm}$ lies at the centre of a large circular loop of radius $10\ \text{cm}$, in the same plane, as shown in the figure. Take $\mu_0 = 4\pi \times 10^{-7}\ \text{T m/A}$. The mutual inductance of the pair is closest to

Fig. 1: Two circular loops with the same centre, in the same plane: a large loop of radius 10 cm and a small loop of radius 1 cm.