Which one of the following substance has the highest proton affinity

1.	Which one of the following substance has the highest proton affinity [AIEEE 2003]
A.	\[{{H}_{2}}O\]
B.	\[{{H}_{2}}S\]
C.	\[N{{H}_{3}}\]
D.	\[P{{H}_{3}}\]
Answer» D. \[P{{H}_{3}}\]

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Which one of the following substance has the highest proton affinity [AIEEE 2003]

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