Option 1: This option states that both statements are individually true and Statement II is the correct explanation of Statement I. Let`s examine each statement separately:

Statement I: The process of decay and disintegration of rocks in situ is called weathering.

Explanation: This statement is true. Weathering refers to the various processes that cause rocks to break down and disintegrate over time. It can be caused by physical, chemical, or biological actions.

Statement II: Weathering takes place both mechanically and chemically.

Explanation: This statement is also true. Weathering can occur through mechanical processes, such as freeze-thaw cycles, abrasion, or pressure, which physically break apart the rocks. It can also occur through chemical processes, such as dissolution, oxidation, or hydrolysis, which chemically alter the rocks.

Given that both statements are true and that Statement II correctly explains Statement I, we can conclude that option 1 is incorrect.

Option 2: This option states that both statements are individually true, but Statement II is not the correct explanation of Statement I. We have already established that both statements are true, so this option appears to be correct.

Option 3: This option states that Statement I is true but Statement II is false. However, we have