To solve this problem, we need to analyze the assertion and the reason given.$\\$Assertion (A): ICl is more reactive than $I_2. \\$Reason (R): I-Cl bond is weaker than I-I bond.$\\$Let's evaluate each statement:$\\$• The reactivity of a molecule is often related to the strength of its bonds.$\\$• A weaker bond generally means that the molecule can more easily participate in reactions,$\\$ because less energy is required to break the bond.$\\$Now, let's compare the bond strengths:$\\$• The I-Cl bond is weaker than the I-I bond. This is because the bond between two different atoms$\\$ (I and Cl) is generally weaker than the bond between two identical atoms (I and I),$\\$ due to differences in electronegativity and bond length.$\\$• Therefore, ICl is more reactive than $I_2$ because the I-Cl bond is weaker and can be broken more easily.$\\$Conclusion:$\\$• Both the assertion and the reason are correct.$\\$• The reason correctly explains why ICl is more reactive than $I_2. \\$Thus, the correct answer is Option 1: Both (A) and (R) are correct and (R) is the correct explanation of (A).