Consider the structure given below:

Which of the following option(s) is/ are correct?

$\text{ Size : B.L. }\mathrm{S}-\mathrm{N}>\mathrm{N}-\mathrm{N}$

$\Rightarrow y>x$

$\text{ Size : }\alpha >\beta$

The molecule has plane of symmetry. Also, the structure has optically inactive.Thus, all the statements are correct.