Choose the correct option

Crystals of hydrated calcium sulphate $\left[\text{ gypsum : }\left({\mathrm{CaSO}}_4\cdot 2{\mathrm{H}}_2\mathrm{O}\right)\right]$ are soft and easily cleaved.

Strong electrovalent connections hold the ions together within the ${\mathrm{Ca}}^{2+}/{\mathrm{SO}}_4^{2-}$ layers. These distinct ${\mathrm{Ca}}^{2+}/{\mathrm{SO}}_4^{2-}$ layers are nevertheless connected by a weak H-bond. ${\mathrm{SO}}_4^{2-}$ ions in the middle area of the weaker H-bond connection. As a result, it is simple to cleave and stretch the gypsum along the water molecule layer. Anhydride only contains the ions ${\mathrm{Ca}}^{2+}$ and ${\mathrm{SO}}_4^{2-}$ in its whole ionic structure

Both Assertion and Reason are correct and reason is NOT the correct explanation of Assertion

Hence correct option is B.