Strongest reducing agent is [CPMT 1977; BHU 1984, 96; MP PET 1990; AMU 1999]

• A.                 \[{{F}^{-}}\]       
• B.                 \[C{{l}^{-}}\]
• C.                 \[B{{r}^{-}}\]     
• D.                 \[{{I}^{-}}\]