What condition is indicated by symptoms such as generalized weakness, fever, malaise, joint aches, jaundice, and markedly deranged liver function tests in a patient with a history of risky sexual behavior?

The symptoms detailed in the question—generalized weakness, fever, malaise, joint aches, jaundice, and markedly deranged liver function tests—are indicative of a viral hepatitis infection. Given the context of the patient's history, particularly the mention of risky sexual behavior, Hepatitis B is a leading consideration in this case.

Hepatitis B is transmitted through contact with infectious body fluids, and sexual transmission is one of the primary modes of transmission. The acute phase of Hepatitis B can present with the symptoms described, including jaundice due to liver dysfunction. During this phase, liver function tests typically show significant derangement, reflecting the inflammatory processes occurring in the liver.

While other options relate to liver disease or inflammation, such as Hepatitis A and Hepatitis C, the sexual risk factor strongly points toward Hepatitis B. Hepatitis A, while it can cause similar symptoms, is usually transmitted via the fecal-oral route and is less likely related to risky sexual behavior. Cirrhosis is a chronic condition resulting from long-standing liver damage and does not typically present acutely in the manner described. Hepatitis C, while also a consideration, is most commonly transmitted through blood and less so sexually, especially compared to Hepatitis B.