Which of the following compounds gives blood red colouration when its Lassaigne's extract is treated with alkali and ferric chloride ?

Options

A. Phenyl hydrazine
B. Diphenyl sulphide
C. Thiourea
D. Benzamide

Answer

C

Explanation

Theourea, `H_(2)N-overset("S")overset("||")("C")-NH_(2)` has both N & S. So it gives blood red colour in SFE test.