SOUTH BEND, Ind. (AP) _ Indiana Attorney General Greg Zoeller says he’ll defend the state’s position on limiting who can sell cold beer against a lawsuit by a trade group representing convenience stores and gas station owners that contend it’s unfair.
 
  The Indiana Petroleum Marketers and Convenience Store Association filed a lawsuit Tuesday in federal court in Indianapolis that calls Indiana’s law allowing only liquor stores and bars to sell cold beer arbitrary. The lawsuit contends Indiana is the only state that regulates the temperature beer may be sold at and that there’s no legitimate purpose for the restriction.
 
  The lawsuit names the state, the Indiana Alcohol and Tobacco Commission and its chairman as defendants. Spokesman Brandon Thomas said the commission would not comment on pending litigation.