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प्रश्न
Fill in the blank
Polluted air is harmful to ____.
रिकाम्या जागा भरा
उत्तर
Polluted air is harmful to health.
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| Column-I | Column-ll | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of airflow |
| (e) | Wind | (v) | Prevent dust particles |
