Answer the following question given this paragraph: 

Note Acetylene is used in oxyacetylene torches for cutting and welding metals. The flame from such a torch can be very hot. Most acetylene, however, is converted to chemical intermediates that are used to make vinyl and acrylic plastics, fibers, resins, and a variety of other products.


Q: Which material used in oxyacetylene torches helps cut and weld metals?

 Choices:

- carbon

- sulfur

- dioxide

- acetylene

A:
acetylene
