The severe depletion of stratospheric ozone in late winter and early spring in which region is commonly known as the 'ozone hole'?

The International Day for the Preservation of the Ozone Layer is observed globally on which date?

Read the statements marked as Assertion (A) and Reason (R) and choose the correct option: Assertion (A): Delhi often reports extremely high Air Quality Index (AQI) values during winters. Reason (R): Its geographical position and landlocked nature restrict air movement, causing inversion and trapping pollutants.