LUCKNOW: A day after evading questions on Uttar Pradesh Chief Minister Yogi Adityanath's 'batenge toh katenge' slogan, his deputy Keshav Prasad Maurya on Sunday described it as a call for unity and asked why was the opposition having a "stomach ache" over the slogan. The slogan, frequently used by Adityanath on the campaign trail, has united the opposition in its …