`underline (A) overset( 4 K OH, O_(2))to 2underline (B) underset(("Green"))(+2H_(2)O)`
`3 underline(B) overset(4HCl) to 2 underline (C) underset(("Puple"))(+ MnO _(2) +) 2 H _(2)O `
`2 underline (C) overset(H_(2) O, KI) to2 underline (A) + 2KOH+ underline(D)`
In the above sequence of reaction `underline (A) and underline (D)` respectively, are:

Options

A. `KIO_3 and MnO_2`
B. `MnO_2 and KIO_3` s
C. `KI and K_2MnO_4`
D. `KI and KMnO_4`

Answer

B

Explanation

`underset((A))(2MnO_2) + 4KOH + O_2 to underset(("Green")(B))(2K_2 MnO_4) + 2H_2O`
`underset((B))(3K_2MnO_4) + 4HCl to underset(("Purple")(C))(2KMnO_4) + MnO_2 + 4KCl + 2H_2O`
`underset((C)) (2KMnO_4) + KI + H_2O to underset((A))(2MnO_2) + underset((D))(KIO_3) + 2KOH`.