Consider the following statements regarding the Refuse Derived Fuel (RDF)? 

  1. It is mainly a pre-processing of the municipal solid waste to use it as a fuel in boilers or kilns
  2. The calorific value of RDF is approximately half of that of coal and depends upon the combustible content. 
  3. The part content of RDF is marketable. 

Which among the above statements hold correct?

[A] 1 only
[B] 1 & 2 only
[C] 1 & 3 only
[D] all statements are correct

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