Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test People Development & Environment Basics of Environment Environment
Which among the following chronic lung disease commonly known as ‘black lung’ disease, leads to reduced life expectancy in coal-miners?
1
Asthma
2
Pneumoconiosis
3
Progressive Massive Fibrosis
4
More than one of the above
5
None of the above