Tanks were very effective in laddak till T-90 were to decimate lighter chinese tanks. Chinese light armour was no match for T-90 and india had put its best of the best tank. Chinese buildup was no where near to strength of indian firepower that T-90 brought to battlefield.
As soon as news broke out india wants to buy light tanks to serve in mountains as current crop of MBT is not apt for region like laddak, and currently india does not have proper tank to tank counter, tanks become irrelevant!
Thanks for your response.
Assume there are no T-90s. Can't india deal with chinese light tanks with spike? My question is how effective are tanks in an environment that is barren (and flat) and offers no camouflage.