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B
PH3
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C
SbH3
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D
AsH3
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Solution
The correct option is ANH3 As we from top to bottom in a group the dipole moment of hydrides of the elements of that particular group decreases dye to increase in the size of the element So the order of dipole moment of the given hydrides NH3>PH3>AsH3>SbH3 Hence option A is correct.