Copper wire test for halogens is known as

The test in which a clean copper wire is first heated in a non-luminous flame, then dipped into the organic sample and reheated to observe an intense green or bluish-green flame (due to volatile $$CuX_2$$, where $$X$$ is a halogen) is called the Beilstein’s test. It is used for the qualitative detection of halogens (Cl, Br, I) in an organic compound.

Other names listed correspond to different estimations: Dumas (nitrogen), Liebig (carbon & hydrogen), and Lassaigne (sodium fusion for extra elements). Hence they are inappropriate for this specific flame test.

Option B which is: Beilstein's Test