Which type of agents include GB and HD?

The correct answer is nerve agents. GB and HD are both classified as nerve agents, which are a group of chemicals that disrupt the normal functioning of the nervous system. These agents inhibit the enzyme acetylcholinesterase, which is responsible for breaking down acetylcholine, a neurotransmitter. When acetylcholine accumulates at nerve endings, it leads to overstimulation of muscles, glands, and the central nervous system, resulting in symptoms such as muscle twitching, respiratory failure, and potentially death.

Nerve agents are designed for rapid incapacitation and lethal effects, making them particularly dangerous in military environments. GB, also known as sarin, is a highly toxic nerve agent, while HD, or mustard gas, is actually not a nerve agent but a blister agent, though its inclusion in the context can sometimes cause confusion. It's important to note that while both GB and HD are associated with chemical warfare, only GB falls under the category of nerve agents specifically.

Understanding the categories of chemical agents and their specific characteristics is crucial for recognizing their potential effects and for effective response in combat situations.