Option 1 states that both Statement I and Statement II are individually true, and Statement II is the correct explanation of Statement I. Statement I claims that the blue color of copper sulphate crystal disappears when it is heated strongly, and Statement II states that this is due to the loss of water of crystallization from the crystal.

Upon heating copper sulphate crystals, they undergo a process known as dehydration, where water molecules are removed from the crystal lattice. These water molecules are referred to as water of crystallization. The blue color of the crystal is actually due to the presence of these water molecules. So, when the crystals are heated strongly, the water molecules are lost, leading to the disappearance of the blue color.

Option 1 accurately explains that Statement II provides the correct explanation for Statement I. Therefore, the correct answer is option 1.

No alert is necessary as the provided answer is correct.