**Core Concept:**
The question is about a patient presenting with retrosternal chest pain, radiation to the back, and aggravation with breathing and movement. The patient has a history of mild upper respiratory tract infection a week ago. The patient's cardiogram is shown, which further supports the cardiac origin of pain.

**Why the Correct Answer is Right:**
The correct answer, **D. Anterolateral ST-segment depression**, is related to an acute myocardial infarction (heart attack). Anterolateral ST-segment depression indicates a decrease in the electrical potential on the electrocardiogram (ECG) in the anterolateral leads (V3-V6), which are located over the left side of the chest. This pattern is commonly seen in inferior wall (anterolateral wall) myocardial infarction (MI) due to occlusion of the left circumflex artery (LCX) or its branches. The patient's history of a recent upper respiratory tract infection and worsening pain with movement and deep breathing are also consistent with an inferior wall MI.

**Why Each Wrong Option is Incorrect:**

A. **Non-specific ST-segment elevation in leads V2 and V3**: This option refers to ST-segment elevation, which is less common in inferior wall MI compared to ST-segment depression.

B. **Sinus tachycardia**: This refers to an increased heart rate, which is unlikely to cause the described symptoms and ECG findings.

C. **Ventricular premature complexes**: This refers to premature ventricular contractions, which are generally benign and do not present with the described severe retrosternal pain and ECG findings.

**Clinical Pearl:** Anterolateral ST-segment depression on the ECG in a patient with recent upper respiratory tract infection and worsening pain with movement and deep breathing is a clue to an inferior wall myocardial infarction due to occlusion of the left circumflex artery or its branches. Early recognition and management of this condition can significantly improve the patient's outcome.