Geography · Environment and Ecology

With reference to the geographical factors contributing to recurring winter air pollution in Delhi, consider the following statements: I. Delhi's position within the Indo-Gangetic Plain gives rise to terrain conditions that restrict effective horizontal movement of air. II. In the late autumn and early winter period, temperature inversion leads to a reduction in vertical mixing, thereby trapping pollutants near the surface. III. The Himalayan ranges to the north and the Aravalli hills to the southwest act as barriers that weaken wind circulation and limit pollutant dispersion. Which of the statements given above are correct?