Predict the product of reaction of quinone and hydrochloric acid This is the question:



And this is my solution:



In the last step, I have tautomerised, and in the second last step, there is no double bond between carbon attached with Cl and OH (just some cutout work)

The answer given is B, but my answer comes out to be C.
The product of the addition of one chloride ion (C) is easily oxidized by atmospheric oxygen (radical mechanism). The obtained 2-chloro-1,4-benzoquinone is susceptible to conjugate addition of another chloride ion, this happens chemoselectively at the more electron deficient double bond which has already a chlorine attached to one carbon atom.