Task: Text Categorization
Input (English): Question: The reaction in which a vinyl halide or aryl reacts with a terminal alkyne in the presence of cuprous iodide and a Pd (0) catalyst is known as the reaction of: 
 Options:  <0> Suzuki <1> Heck <2> Stille <3> Sonogashira. <4> Sharpless.
Output (English): chemistry