India has never been really known for 1 year programs, yet there are some 1 year PGPX programs that rank amongst the best not just in India but globally. Have a look!
Note, Work experience is needed for sure
ISB Hyderabad
IIM Ahmedabad
IIM Bangalore
IIM Calcutta
IIM Lucknow
XLRI Jamshedpur
SPJIMR Mumbai
Great Lakes Institute of Management, Chennai
MDI Gurgaon
IMI Delhi