Answer:

Introduction:
Starch is a polysaccharide composed of repeating units of glucose molecules. It is a storage form of energy in plants and is the most abundant carbohydrate in our diet. The glucose molecules in starch can exist in two different anomeric forms - alpha and beta. These anomers differ in the orientation of the hydroxyl group attached to the anomeric carbon atom.

Explanation:
Starch is composed of two main polysaccharides: amylose and amylopectin. Both amylose and amylopectin are made up of glucose molecules linked together through glycosidic bonds.

Alpha and Beta Anomers:
1. Alpha Anomer: In the alpha form, the hydroxyl group attached to the anomeric carbon (C1) is in a downward position.
2. Beta Anomer: In the beta form, the hydroxyl group attached to the anomeric carbon (C1) is in an upward position.

Presence of Anomeric Forms in Starch:
In starch, the glucose molecules are predominantly present in the alpha form. This means that the hydroxyl group attached to the anomeric carbon (C1) of glucose is in a downward position. Therefore, the correct answer is option 'A' - Alpha D glucose.

Reasoning:
Starch is a polysaccharide composed of glucose molecules linked together. The glycosidic bonds between the glucose molecules determine the orientation of the hydroxyl group attached to the anomeric carbon (C1). In starch, the predominant form of glucose is the alpha form, with the hydroxyl group in a downward position. The beta form is less common in starch.

Conclusion:
In conclusion, the alpha D glucose anomeric form is predominantly present in starch. This form is characterized by the hydroxyl group attached to the anomeric carbon (C1) being in a downward position. It is important to note that starch can also contain small amounts of the beta form, but the alpha form is the major constituent.