ONGC falls; gas price hike seen discounted
Oil and Natural Gas Corp falls 0.1 percent
India to decide on diesel deregulation after state polls.
Traders add stock has already priced in higher gas prices.
ONGC is up 40 percent in 2014 as of Tuesday versus a 26 percent gain in Nifty.
(Reporting by Abhishek Vishnoi)