Final answer:
The best contrast resolution is available with 16 bits in a digital scan converter.
Step-by-step explanation:
The best contrast resolution is available with 16 bits in a digital scan converter. The number of bits in a scan converter determines the number of shades of gray that can be displayed. With 16 bits, there are 2^16 or 65,536 shades of gray available, which provides the highest contrast resolution.