Four students (A),(B),(C) and (D) observed the colour and solubility of iron, sulphur and iron, sulphur and iron sulphide in carbon disulphide. The tick mark represents soluble and cross mark represents insoluble, in carbon disulphide. Their observation are tabulated below
The student who correctly reported the observations, is student :
A. A
B. B
C. C
D. D
