उपर्युक्त परिच्छेद से, निम्नलिखित में से कौन-सा सर्वोत्तम तार्किक और तर्कसंगत निष्कर्ष (इन्फरेंस) निकाला जा सकता है?

Correct Option: Air quality index is not helpful to the residents of many of our large cities.

The passage outlines that an Air Quality Index (AQI) is most effective when pollution levels are normally low, allowing the public to take quick preventive actions during temporary spikes. However, in major Indian cities, pollution levels are consistently high and remain well above regulatory and safety standards throughout most of the year. When the index remains constantly in the 'Red/Dangerous' zone day after day, it becomes ineffective because residents have no practical recourse other than to get used to ignoring it. This leads directly to the logical inference that the AQI is not helpful to the residents of many of our large cities, as it fails to serve its primary purpose of warning about anomalous spikes. Therefore, Option C is the most rational and direct inference from the text.