A 42-year-old woman from Mumbai is admitted with severe pneumonia and sepsis. Sputum culture grows a gram-negative rod identified as *Klebsiella pneumoniae*. Antibiotic susceptibility testing shows resistance to all beta-lactams including carbapenems (meropenem MIC 16 µg/mL), but susceptibility to colistin and tigecycline. The organism produces a Hodge test-positive result. Which carbapenemase enzyme is most likely responsible for this resistance pattern in this Indian hospital setting?