Explanation:

• Four years since the introduction of the National Clean Air Programme (NCAP) — India’s first national policy on curbing air pollution — air quality has improved in only 49 out of 131 cities in FY 21-22, compared to the previous year, according to a report by the Centre for Research on Energy and Clean Air (CREA). Less than 50% utilisation of total funds is released under NCAP. 
• PRANA (Portal for Regulation of Air-pollution in Non-Attainment cities) is a portal for monitoring of the implementation of the National Clean Air Programme (NCAP). Hence, option (a) is the correct answer.
o It will support tracking of physical as well as financial status of city air action plan implementation and disseminate information on air quality management efforts under NCAP to
public.
o It would also disseminate information on air quality to the public while also providing comprehensive information related to NCAP programme details, progress, city action plans, implementation updates
by city/state/ national level agencies, air quality data, and trends, etc. • About NCAP
• Launched in 2019, it is a time-bound, national level strategy from Central Government to tackle air pollution problem across country in a comprehensive manner.
• It aims a 40% reduction in Particulate Matter (PM) concentrations by 2026 (base year 2017) in 131 cities (123 non-attainment cities and 42 million plus cities/urban agglomerations; 34 cities are common in both categories).