You can study CPL in any country. But select a program as per the specifications of Indain DGCA.Australia is the best country offering Indian CPL courses followed by USA,When you finish your course you can come back to India and convert your CPL to Indian CPL.
Qualification required to become a pilot in India
Commercial Pilots Licence (CPL) with Multi Engine Command Instrument Rating (MECIR)
PROGRAM - PROGRESSION
Student Licence - Private Pilot Licence - Commercial Pilot Licence -CIR-ME
DURATION - 52 WEEKS
Pre Requisites to start training
Minimum age 18 by the time you finish your training