In the diagram above, R is a mixture of?
A.
potassium tetraxochlorate (VII) and concentrated H2SO4
B.
potassium trioxochlorate (V) and concentrated H2SO4
C.
potassium tetratoxomanganate (VII) and concentrated HCI
D.
manganes (IV) oxide and concentrated HCI
Correct answer is D
No explanation has been provided for this answer.