Given below are two statements, one is labelled asAssertion (A) :and the other as Reason (R).Assertion (A):A solution of table salt in a glass of water is homegeneous.Reason (R):A solution having different composition throughout is homogengeous.Select the correct answer from the code given below:

1. A

   (A) is false but (R) is true

   Option (a) claims that Assertion (A) is false while Reason (R) is true. However, the assertion is chemically correct because table salt dissolves uniformly in water, making it a homogeneous mixture.

2. B

   (A) is true but (R) is false

   Option (b) claims that Assertion (A) is true, stating that a solution of table salt in water is homogeneous, but Reason (R) is false because a homogeneous solution actually has a uniform composition throughout rather than different compositions. This accurately identifies the correct relationship where the assertion is scientifically sound and the reason provided gives a contradictory and incorrect definition of homogeneity, establishing this option as the required key for the question.

3. C

   Both (A) and (R) are true but (R) is not the correct explanation of (A)

   Option (c) claims that both statements are true but (R) is not the correct explanation for (A). This is incorrect because the reason incorrectly defines homogeneity as having different compositions throughout, which makes the reason factually false.

4. D

   Both (A) and (R) are true and (R) is the correct explanation of (A)

   Option (d) claims that both statements are true and (R) correctly explains (A). This fails because the reason contains a fundamentally flawed definition of a homogeneous mixture, rendering it false.

Summary. Official key is (b) because the assertion correctly identifies a salt-water solution as homogeneous, while the reason falsely claims that such a solution has different compositions throughout. A homogeneous mixture must maintain a uniform composition at any given point in the sample. Students often confuse homogeneous and heterogeneous mixtures by misinterpreting phase distribution. Option (b) is therefore the only choice that correctly validates the true assertion and rejects the false reason.