Growth in India is a result of plucking the low hanging fruit in the immediate aftermath of going from largely a socialist centrally planned economy to a sort of free market economy.
This process has been gradually unfolding over the past two decades, as we invite foreign direct investments and do away with many pointless regulations.
This sort of a growth has a upper limit which will be breached sooner or later.
b) around the point where Mexico or Brazil are (Mexico: $10k GDP per capita, Brazil: $8k, India: $2k)
India just by reaching Brazil's level can still grow its economy 4 times or more. At that point its economy would be something like 80% of the US one, based on sheer population volume.
And this is only one scenario, one where they fall into this "middle income trap".
