• Purplish Red $\to$ (II) Deoxymyoglobin: Reduced myoglobin ($Fe^{2+}$, water bound at 6th coordinate position); characteristic color of freshly cut vacuum-packaged meat.
• Brown $\to$ (III) Metmyoglobin: Oxidized ferric myoglobin ($Fe^{3+}$, $OH^-$ bound); responsible for surface browning in aged or spoiled retail meat.
• Bright Red $\to$ (IV) Oxymyoglobin: Oxygenated myoglobin ($Fe^{2+} + O_2$); "bloomed" fresh meat exposed to atmospheric oxygen.
• Pink $\to$ (I) Nitrosyl Haemochromogen: Denatured globin complex formed when cured nitrosomyoglobin ($Fe^{2+}\text{-NO}$) is thermally cooked (gives cured ham and frankfurters their stable pink color).

Correct option: (4) (A) - (II), (B) - (III), (C) - (IV), (D) - (I)

• Role of Alkaline Phosphates in Meat Emulsions / Sausages:
• Increases Water Holding Capacity (WHC): Polyphosphates (e.g., sodium tripolyphosphate - STPP, tetrasodium pyrophosphate) elevate meat pH away from the isoelectric point ($pI = 5.4$) and chelate divalent cations ($Mg^{2+}, Ca^{2+}$), loosening the actomyosin network to bind large volumes of water and fat.
• Antioxidant Action: Chelation of pro-oxidant transition metal ions ($Fe^{2+}, Cu^{2+}$) retards lipid oxidation and warmed-over flavor (WOF).
• Other Aspects:
• Legal limit is $0.5\%$ in finished meat products (not $0.3\%$).
• Phosphates are not primary antimicrobial agents.
• Conclusion: Statements (A) and (C) only.

Correct option: (4) (A) and (C) only.

• Assertion (A) is True: Quick freezing ($\gt 1\text{--}5\text{ cm/h}$) is vastly superior to slow freezing because it produces numerous microscopic ice crystals uniformly distributed both inside and outside muscle cells, preserving sarcolemma integrity and minimizing freeze-induced thaw drip and structural distortion.
• Reason (R) is True: As water freezes out of solution as pure ice, the residual unfrozen water becomes progressively concentrated with mineral salts and organic solutes, progressively lowering the freezing point until the eutectic point (the temperature where the entire mixture solidifies simultaneously) is reached.
• Relationship: While both are true physical phenomena in meat cryo-preservation, (R) describes eutectic thermodynamic behavior rather than explaining why small intracellular ice crystals in quick freezing reduce cellular damage.

Correct option: (2) Both (A) and (R) are true but (R) is NOT the correct explanation of (A).

• Assertion (A) is True: During the lag phase of bacterial growth, cells do not divide numerically, but they are metabolically hyperactive: synthesizing enzymes, RNA, and structural cofactors, leading to a substantial increase in individual cell size.
• Reason (R) is True: The fundamental principle of chilling/refrigeration ($0\text{ to }4^\circ\text{C}$) is to drastically slow down biochemical reaction rates, thereby prolonging the microbial lag phase so that exponential growth does not occur during storage.
• Relationship: Both statements are true, but (R) concerns food refrigeration preservation principles rather than explaining the cytological reasons for cell enlargement during the lag phase.

Correct option: (2) Both (A) and (R) are true but (R) is NOT the correct explanation of (A).