Assertion (A) `beta`-glycosidic linkage is present in maltose.
Reason (R) Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.
(a)Assertion and reason both are correct statements and reason explains the assertion.
(b)Both assertion and reason are wrong statements
(c)Assertion is correct statement and reason is wrong statement.
(d)Assertion is wrong statement and reason is correct statement.

Options

A. Assertion and reason both are correct statements and reason explains the assertion.
B. Both assertion and reason are wrong statements
C. Assertion is correct statement and reason is wrong statement.
D. Assertion is wrong statement and reason is correct statement.

Explanation

To solve the question regarding the assertion and reason about maltose, let's break it down step by step.

### Step 1: Understand the Assertion
The assertion states that "beta-glycosidic linkage is present in maltose." We need to determine if this statement is true or false.

### Step 2: Identify the Type of Linkage in Maltose
Maltose is a disaccharide formed from two glucose units. The linkage between these glucose units is crucial in identifying the type of glycosidic bond present.

- Maltose specifically has an **alpha-glycosidic linkage** between the first carbon (C-1) of one glucose unit and the fourth carbon (C-4) of another glucose unit.

### Step 3: Evaluate the Assertion
Since maltose contains an **alpha-glycosidic linkage** and not a beta-glycosidic linkage, the assertion is **false**.

### Step 4: Understand the Reason
The reason states that "Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit."

- This statement is indeed **true**. Maltose is composed of two glucose units connected by the aforementioned linkage.

### Step 5: Evaluate the Reason
Since the reason correctly describes the structure of maltose, we can conclude that the reason is **true**.

### Step 6: Conclusion
Now that we have evaluated both the assertion and the reason:
- Assertion (A) is **false**.
- Reason (R) is **true**.

### Final Answer
The correct option is (d): Assertion is a wrong statement and reason is a correct statement.

---