Question

Which of the following underlined part is grammatically incorrect

Rapid industrial growth, unregulated emissions and a host of other issues (a) significantly contribute to the rise in air pollution. In some cases, (b) the severity of air pollution reached an extent where government intervention was necessary. The Great Smog of London, 1952, was an (c) extreme case of air pollution where visibility was severely.​

Answer 1

1. unregulated emissions and other issues.
2. significantly contribute in the rise of air pollution
3. in some cases ✔️
4. the severity of air pollution reached to the extent of where government intervention is still necessary.

Answer 2

Explanation:

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