An ace spying group trained by the Police in London
B
A weed-killing chemical used by the US Military in the Vietnam War
C
A technique used in the advanced railway safety procedure
D
A special chemical used in making alloy steel
Correct Answer: Option B
Explanation
1. Agent Orange refers to one of the herbicides and defoliants used by the U.S. Military as part of its chemical warfare program, Operation Ranch Hand, during the Vietnam War from 1961 to 1971.
2. It was a mixture of two herbicides, 2,4,5-T and 2,4-D.
3. It was used to defoliate forests and rural land, depriving Viet Cong and North Vietnamese troops of cover; it was essentially a potent weed-killing chemical used in warfare.