A : Dextrins are intermediate polysaccharides formed during hydrolysis of starch into sugar.
R : Ascorbic acid is a sugar derivative.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statements but Reason is false, then mark (3).
D. If both Assertion and Reason are false statements, then mark (4)

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Dextrins are intermediate polysaccharides formed during hydrolysis of starch into sugar." To evaluate this, we need to understand what dextrins are and how they relate to starch hydrolysis.

2. **Definition of Dextrins**: Dextrins are indeed products formed during the breakdown of starch. They are oligosaccharides, which means they are not strictly polysaccharides but are composed of a few glucose units. They are formed when starch is hydrolyzed by enzymes such as amylase.

3. **Process of Starch Hydrolysis**: Starch is a polysaccharide made up of many glucose units. When starch is hydrolyzed, it is broken down into smaller units, including dextrins and eventually into monosaccharides like glucose. This process begins in the mouth with salivary amylase and continues in the intestine with pancreatic amylase.

4. **Conclusion on Assertion**: The assertion is partially correct in that dextrins are indeed formed during the hydrolysis of starch, but they are not classified as intermediate polysaccharides. Instead, they are better described as oligosaccharides. Therefore, the assertion is **false**.

5. **Understanding the Reason**: The reason states that "Ascorbic acid is a sugar derivative." To evaluate this, we need to understand what ascorbic acid is and its relationship to sugars.

6. **Definition of Ascorbic Acid**: Ascorbic acid, commonly known as Vitamin C, is a compound that has a structure related to sugars, specifically glucose. It is synthesized from glucose in plants and is found in many fruits.

7. **Is Ascorbic Acid a Sugar Derivative?**: While ascorbic acid is derived from glucose, it is not a sugar itself but rather a derivative. However, it is often found in nature in a free state, which is atypical for sugar derivatives that are usually found in combined forms.

8. **Conclusion on Reason**: The reason is misleading. Although ascorbic acid is related to sugars, it is not classified as a sugar derivative in the conventional sense. Therefore, the reason is also **false**.

9. **Final Evaluation**: Since both the assertion and reason are false, we conclude that the correct answer is that both statements are incorrect.