Why was Ludhiana Metro cancelled?

Authorities stated that it was not viable to have metro in the city However, considering it's the biggest city in Punjab state and also one with the highest population north of Delhi, I think a metro would have been a decent public transport here. Not to mention there are cities like Meerut having less population than Ludhiana which would be having metro in the coming years(already in construction) and many are on the way to have Metro in their cities. What do your guys think?