• Fundamental vs Empirical Rheological Properties:
• Fundamental Rheological Properties:
• Well-defined physical quantities independent of sample geometry, instrument dimensions, or test speed (e.g., shear modulus, true viscosity, fracture stress / true failure stress).
• Empirical Texture Profile Analysis (TPA) Properties:
• Hardness, chewiness, adhesiveness, and gumminess are empirical, instrument-dependent sensory descriptors measured via two-bite force-time curves.
• Conclusion: Fracture stress (Option 4).

Correct option: (4) Fracture stress

• Total Solids Determination in Composite Ice Cream Cake:
• Product Composition & Standards:
• Ice cream mix formulated for an overrun of $90\%$ requires minimum $36\%$ Total Solids (fat, MSNF, sugars, stabilizers) to maintain structural air-cell stability.
• Chocolate cake layers contain $70 - 75\%$ Total Solids.
• For a composite dessert exhibiting $4\%\text{ w/w}$ protein and $90\%$ overrun, the combined weighted total solids content inherently exceeds $36\%\text{ w/w}$.
• Conclusion: More than 36% w/w (Option 3).

Correct option: (3) More than 36% wiw

• Lactulose Formation via Thermal Isomerization of Lactose:
• Lobry de Bruyn-Alberda van Ekenstein Transformation:
• Under intense heat treatment (e.g., in in-bottle sterilized or UHT milk), lactose (4-O-$\beta$-D-galactopyranosyl-D-glucose) isomerizes into Lactulose (4-O-$\beta$-D-galactopyranosyl-D-fructose).
• Physiological & Diagnostic Properties:
• Non-digestible disaccharide utilized clinically as an osmotic laxative and hepatic encephalopathy therapeutic, and serves as an official chemical index of severe milk heat treatment.
• Conclusion: Lactulose (Option 2).

Correct option: (2) Lactulose