LUCKNOW, Dec. 14 -- The state capital continued to choke as its air quality index (AQI) remained in the 'poor' category for the third consecutive day on Saturday, making this spell the longest this season. According to Central Pollution Control Board data, Lucknow recorded an overall AQI of 230 on Sat- urday, marginally better than Friday's 232 and Thursday's 237. P3...