bihaar mein ati jal dohan se kis tatv ka sankendran badha hai
Q. बिहार में अति जल दोहन से किस तत्व का संकेन्द्रण बढ़ा है ? bihaar mein ati jal dohan se kis tatv ka sankendran badha hai
Ans-c. आर्सेनिक
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