The formation of is a positive result in the vdrl test.
flocculant
precipitin
coagulation
a bright pink color

flocculant is a correct answer.

Explanation:

VDRL stands for the venereal disease research laboratory.

VDRL test is used to detect whether the person is suffering from syphilis sexually transmitted infection or not which is caused by Treponema pallidum, with the help of The VDRL test we can detect the antibodies present in the blood when the patient is suffering for syphilis.

The formation of flocculant is a positive result in the VDRL test because the anti treponemal antibodies present in the infected person serum get bind to the cardiolipin which results in the formation flocculant.