Pick out the wrong statement.

• 'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid.
• Chemically unreactive nature of red phosphorous is due to its polymeric structure.
• Red phosphorous is the most reactive allotropic form of phosphorous.
• Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation.