Directions: The following question has two blanks, each blank indicating that something has been omitted. Choose the set of words for each blank that best fits in the context of the sentence. Auto-rickshaws are held to _________ rather than add to Delhi’s pollution problem, since they run on CNG which is a _________ fuel.

Step-by-step solution

The sentence tries to say that auto-rickshaws are believed to decrease rather than add to the pollution in Delhi, because they use CNG. This leads us to conclude that CNG must be an eco-friendly fuel, hinting at the word “cleaner” for the second blank. The word for the first blank must be opposite in meaning to “add to pollution”. Hence, “mitigate” meaning 'make less severe' fits the first blank. "Agitate" and "intensify" are logically contradictory to the sentence and he