Explanation:

The Indo-Gangetic Plain has the worst air pollution. New Delhi and several of the most polluted cities are located in this region. 

• Lead poisoning or chronic intoxication is caused by the absorption of Lead in the circulatory system of the human being. It is characterized especially by fatigue, abdominal pain, nausea, diarrhea, loss of appetite, a dark line along the gums, and muscle paralysis or weakness of limbs.
• Lead exposure also causes anemia, hypertension, renal impairment, immunotoxicity and toxicity to the reproductive organs.

Hence both statements are correct.