Step 1: The National Chemical Laboratory is one of the constituent laboratories of the Council of Scientific and Industrial Research (CSIR), which operates a network of research laboratories across India, each usually specialised in a particular field.
Step 2: NCL was established in 1950 and its campus is located in Pune, Maharashtra, where it carries out research in chemical sciences, catalysis, polymer science and chemical engineering.
Step 3: The other cities listed host different national institutes; for example, New Delhi hosts the CSIR headquarters and other institutes, and Bangalore hosts the Indian Institute of Science, but the National Chemical Laboratory specifically is in Pune.
Step 4: So the correct option is C, Pune.