• Manufacture of Synthetic and Regenerated Fibers via Dry Spinning:
• Dry Spinning Process:
• The fiber-forming polymer is dissolved in a volatile organic solvent (e.g., cellulose acetate dissolved in acetone).
• The polymer dope is extruded through spinneret orifices into a vertical spinning tower where a counter-current stream of warm air evaporates the solvent, solidifying continuous filaments.
• Comparison of Spinning Systems:
• Dry spinning: Cellulose Acetate, Spandex, Acrylic.
• Melt spinning: Nylon, Polyester, Polypropylene.
• Wet spinning: Viscose Rayon, Cuprammonium Rayon.
• Conclusion: Acetate (Option 1).

Correct option: (1) Acetate