Final answer:
Fibrous proteins, such as collagen, are insoluble in water and serve structural functions. Among the provided options, collagen is the fibrous protein that fits the likely intended term 'Fibkaus Protein.' Therefore, the correct option is A.
Step-by-step explanation:
The student asked which protein is Fibkaus Protein, with options A. Collagen B. Enzyme C. Hemoglobin D. Histons. To answer, there seems to be a typo, and the correct term might be “Fibrous Protein.” Fibrous proteins are insoluble in water and serve structural, connective, and protective functions. Examples of fibrous proteins include keratins, collagens, myosins, and elastins.
From the options provided, collagen would be the best match as it is a fibrous protein found in connective tissues.