By adding 1 ml of orthotolidine solution to 100 ml chlorinated water taken after contact period, the residual chlorine makes the colour of solution

By adding 1 ml of orthotolidine solution to 100 ml chlorinated water t

1.	By adding 1 ml of orthotolidine solution to 100 ml chlorinated water taken after contact period, the residual chlorine makes the colour of solution
A.	yellowish
B.	greenish
C.	bluish
D.	reddish
E.	violet.
Answer» B. greenish