A. Gonorrhoea caused by Neisseria gonorrhoeae, symptoms include frequent urination, pain or burning sensation while urinating.B. Trichomoniasis caused by Trichomonas vaginalis, symptoms include genital itching, burning, swelling, redness.
C. Hepatitis B caused by Hepatitis B virus, symptoms include skin and white of eyes turn yellow, loss of appetite, vomiting, belly pain.
D. Syphilis caused by Treponema pallidium, symptoms include pain free open sores called chancres around the genital or anal area or mouth.
So, the correct answer is 'A-3, B-4, C-1, D-2'.