Answer: Option 'D' is correct.
Step-by-step explanation:
Measurements were first based on parts of the human body.
In the earlier periods, palm is used for measurement.
The palm is an obsolete unit of length which was actually based on the width of human palm.
Human hand is also used for measurement.
The length between top knuckle of thumb and tip of thumb is approximately 1 inch.
Hence, Option 'D' is correct.