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B
Maxilla
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C
Mandible
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D
Neck
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Solution
The correct option is B Maxilla Poison gland is a gland, in animals or plants, which secretes an acrid or venomous matter, that is conveyed along with an organ capable of inflicting a wound. In snakes, two sac-like poison glands are situated one on either inner side of the upper jaw (maxilla), below the eyes. Each gland is thickly encapsulated with fibrous connective tissue and mostly covered by a fan-shaped constrictor muscle often referred to as temporal. Its stretching during biting squeezes poison from glands into its ducts.