The correct options are
A The Hooghly-Kolkata region
B The Mumbai-Pune region
C The Madurai-Coimbatore-Bengaluru region
The major industrial regions in India are located in the Hooghly-Kolkata, Mumbai-Pune, Ahmedabad-Vadodara, Madurai-Coimbatore-Bengaluru, Chotanagpur, Delhi-Meerut, Vishakapatnam and, Kollam-Thiruvananthapuram regions.