Which one of the following was used as a chemical weapon in the first

1.	Which one of the following was used as a chemical weapon in the first world war ?
Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/mustard-1106767" style="font-weight:bold;" target="_blank" title="Click to know more about MUSTARD">MUSTARD</a> gas</p><br/><br/><p>Although the <a href="https://interviewquestions.tuteehub.com/tag/germans-472687" style="font-weight:bold;" target="_blank" title="Click to know more about GERMANS">GERMANS</a> were the first to use phosgene on the battlefield, it became the primary <a href="https://interviewquestions.tuteehub.com/tag/chemical-914796" style="font-weight:bold;" target="_blank" title="Click to know more about CHEMICAL">CHEMICAL</a> weapon of the Allies. Phosgene was <a href="https://interviewquestions.tuteehub.com/tag/responsible-613932" style="font-weight:bold;" target="_blank" title="Click to know more about RESPONSIBLE">RESPONSIBLE</a> for 85% of chemical-weapons fatalities during <a href="https://interviewquestions.tuteehub.com/tag/world-1460172" style="font-weight:bold;" target="_blank" title="Click to know more about WORLD">WORLD</a> War I. Mustard gas, a potent blistering agent, was dubbed King of the Battle Gases.</p></body></html>

Which one of the following was used as a chemical weapon in the first world war ?