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C H subscript 3 end subscript C O subscript 2 end subscript C subscript 2 end subscript H subscript 5 end subscript on reaction with sodium ethoxide in ethanol gives A, which on heating in the presence of acid gives B compound B is

  1. C H subscript 3 end subscript C O C H subscript 2 end subscript C O O H    
  2. C H subscript 3 end subscript C O C H subscript 3 end subscript    
  3.    
  4. C H subscript 2 end subscript equals C         table row cell O C subscript 2 end subscript H subscript 5 end subscript end cell row cell O C subscript 2 end subscript H subscript 5 end subscript end cell end table    

The correct answer is:


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