A) \[~Sb{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}>N{{H}_{3}}\]
B) \[~N{{H}_{3}}>Sb{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}\]
C) \[~N{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}>Sb{{H}_{3}}\]
D) \[~Sb{{H}_{3}}>As{{H}_{3}}>P{{H}_{3}}>N{{H}_{3}}\]
Correct Answer: C
Solution :
\[~N{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}>Sb{{H}_{3}}\] On moving down the group atomic size increases and availability of lone pair decreases. Hence, basic character decreases.
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