MCQ
o-Phenylenediamine $\stackrel{ HNO _2}{\longrightarrow}$ '$X$'
- ✓

- B

- C

- D







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$(P)\, Fe(CO)_5\,\,\, (Q)\,CO\,\,\, (R)\, H_3B \leftarrow CO\,\,\,(S)\, [Mn(CO)_5]^-$