Step 1: Understanding the Question:
We need to correctly pair each respiratory clinical sign with the condition it classically points to.
Step 2: Key Formula or Approach:
Each of these four signs has one specific classical association taught in clinical examination of the chest, so each pair needs to be recalled individually and then matched against the given codes.
Step 3: Detailed Explanation:
A localized wheeze, heard only over one area of the chest rather than diffusely, points to a local narrowing of a bronchus, most classically from an endobronchial tumour partially obstructing that airway.
Shifting dullness on percussion of the chest, where the level of dullness changes as the patient changes position, occurs when both air and fluid are present together in the pleural space, which is the hallmark of a hydropneumothorax.
The Ellis curve, also called the Ellis-Damoiseau line, describes the curved upper border of dullness seen on examination and X-ray in a pleural effusion, rising higher in the axilla than towards the spine.
Intercostal tenderness over the chest wall is a classical sign of an empyema, where pus under the pleura irritates the overlying intercostal space.
Step 4: Final Answer:
So the correct pairing is localized wheeze with bronchial tumour, shifting dullness with hydropneumothorax, Ellis curve with pleural effusion, and intercostal tenderness with empyema, giving A-4, B-3, C-1, D-2.