Which of the following indicates proper film processing conditions?

Proper film processing conditions lead to the production of clear, high-contrast images. This quality is crucial for diagnostic effectiveness in dental radiography. Clear images ensure that anatomical structures are visible, enabling accurate interpretation. High contrast is important as it delineates different tissues and structures, allowing for an easy distinction between areas of interest, such as caries, periodontal disease, and anatomical landmarks.

The other options fail to represent signs of proper processing. Grainy images suggest that the film may have been overexposed or improperly developed, which detracts from the clarity needed for diagnostics. Faded or indistinct images indicate insufficient development or inadequate exposure, resulting in lost detail necessary for diagnoses. Yellow-brown mottled images are typically a result of inadequate rinsing or fixation during processing, leading to chemical stains on the film, which would obscure important diagnostic information. Thus, clear, high-contrast images are indicative of optimal processing conditions in dental radiography.