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| स्तंभ $I$ | स्तंभ $II$ |
|---|---|
| $A$. $SO_2$ | $I$. प्रकाश रासायनिक धूमकोहरा (Photochemical smog) |
| $B$. $PAN$ | $II$. अम्ल वर्षा |
| $C$. धुआं | $III$. समतापमंडलीय प्रदूषक |
| $D$. $CF_2Cl_2$ | $IV$. कणिकीय पदार्थ (Particulate) |
| List-$I$ | List-$II$ |
|---|---|
| $(A)$ लेड (Lead) | $(I)$ $500 \text{ ppm}$ |
| $(B)$ सल्फेट (Sulphate) | $(II)$ $50 \text{ ppm}$ |
| $(C)$ नाइट्रेट (Nitrate) | $(III)$ $50 \text{ ppb}$ |
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