NFC range is less than how many centimeters?

• A. More than 20 cm
• B. 20 cm
• C. less than 20 mm
• D. more than 20 mm

Answer: (B)

NFC is designed for very short-range communication, relying on magnetic field coupling between devices. Because of this, its practical operating distance is only a few centimeters. That means the range is well under 20 centimeters, so the statement that it is less than 20 centimeters is the correct way to express its typical maximum. In fact, most NFC interactions occur within around 4 centimeters, with even the longer reads staying far below 20 cm. Choices suggesting millimeter-scale ranges are too small for standard NFC interactions, while those implying more than 20 cm describe a range NFC generally doesn’t achieve.