Step 1: Rayon is a regenerated cellulose fibre manufactured from natural cellulose sources such as wood pulp, converted into a soluble form and then spun into fibres.
Step 2: The cellulose sulphate process is one of the chemical routes used to convert cellulose into a soluble derivative that can be extruded and regenerated as continuous rayon fibre, alongside the more common viscose process.
Step 3: Bakery, fermentation and glue industries do not use this cellulose chemistry route, so they are ruled out.
Step 4: So the correct answer is the rayon industry.