In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Delhi’s air quality deteriorates with unfailing ________ at this time of the year, with large swathes of north India in the grip of a suffocating smog, but the State governments that can make it easier for millions to breathe do not act with any sense of ________. That it has turned into a public health emergency ________ the capital, with the air quality index touching extremely hazardous levels in some parts, necessitating the closure of primary schools, has further lowered its standing. It is unconscionable for governments, through ________ and inaction, to subject citizens to such toxic air, and cause extreme suffering especially _________ people with respiratory ailments and impaired lung function.