1. Tangents are drawn form the points on conic. \( S_{1} \equiv \frac{x^{2}}{36}+\frac{y^{2}}{20}=1 \). to the conic \( S_{2} \equiv \frac{x^{2}}{9}+\frac{y^{2}}{5}=1 \). The eccentricity of the locus of the point of intersection of normals at the points of contact of tangents at \( S_{2}=0 \), is
(A) \( \frac{4}{5} \)
(B) \( \frac{2}{3} \)
(C) \( <\frac{\sqrt{5}}{3} \)
(D) \( <\frac{2}{\sqrt{5}} \)
