Q: I am verifying the answers generated by an automatic system to the following question: Where are most of the natural gas Suggested answer: The by-products of processing include ethane , propane , butanes , pentanes , and higher molecular weight hydrocarbons , hydrogen sulfide (which may be converted into pure sulfur ), carbon dioxide , water vapor , and sometimes helium and nitrogen . Should I validate this answer?

Available choices:
(a). No
(b). Yes
A:
(a).