Comment on the paper “MHD flow of Williamson nanofluid over a cone and plate with chemically reactive species, Mair Khan, M.Y. Malik, T. Salahuddin, K.U. Rehman, Muhammad Naseer, Imad khan, Journal of Molecular Liquids 231 (2017) 580-588”

The present comment concerns some doubtful results included in the above paper.