**Core Concept**
The presence of HbsAg (Hepatitis B surface antigen) and IgM antibodies to Hbc (Hepatitis B core antigen) indicates an acute Hepatitis B infection. This is because IgM antibodies to Hbc are typically produced in response to a recent HBV infection, whereas IgG antibodies would be indicative of a past or chronic infection.

**Why the Correct Answer is Right**
The correct answer is related to the serological markers of Hepatitis B virus (HBV) infection. HbsAg is present in the serum of individuals with acute or chronic HBV infection, while IgM antibodies to Hbc are indicative of an acute infection. The presence of both markers suggests that the patient is in the early stages of HBV infection, where the virus is replicating and the immune system is responding with the production of IgM antibodies.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the correct serological markers for acute HBV infection.
**Option B:** This option is incorrect because it does not accurately describe the serological markers for acute HBV infection.
**Option C:** This option is incorrect because it does not specify the correct serological markers for acute HBV infection.
**Option D:** This option is incorrect because it does not accurately describe the serological markers for acute HBV infection.

**Clinical Pearl / High-Yield Fact**
In patients with acute HBV infection, the presence of HbsAg and IgM antibodies to Hbc indicates a high risk of viral transmission to others. Therefore, it is essential to implement strict infection control measures to prevent the spread of the virus.

**Correct Answer: D. Acute Hepatitis B infection.**