Some reagents and their applications are given in the table below. 

Applications	Reagents
	Fricke Solution	CuSO4 in basic solution	MnSO4 in basic Kl solution	Ammonium Ce(IV) sulfate solution
A	[.OH] concentration measurement	Free glucose measurement	dissolved oxygen measurement	Fe2+ estimation in potable water
B	Fe2+ estimation in potable water	Free glucose measurement	[.OH] concentration measurement	dissolved oxygen measurement
C	dissolved oxygen measurement	Fe2+ estimation in potable water	Free glucose measurement	[.OH] concentration measurement
C	[.OH] concentration measurement	dissolved oxygen measurement	Free glucose measurement	Fe2+ estimation in potable water

The option showing the correct match of reagents and their application, is