The permissible error in chaining for measurement with chain on rough or hilly ground is 1 in 500. This means that the maximum error in the measurement of a distance of 500 feet should be no more than 1 foot. This error is due to the fact that the chain is not perfectly straight and that the ground is not perfectly flat.
Option A, 1 in 100, is too small of an error to be realistic. It would be very difficult to achieve such an accurate measurement on rough or hilly ground.
Option B, 1 in 250, is a more realistic error. It is possible to achieve this level of accuracy with careful measurement.
Option C, 1 in 500, is the permissible error that is typically used for chaining on rough or hilly ground. This error is large enough to account for the imperfections in the chain and the ground, but it is small enough to be useful for most purposes.
Option D, 1 in 1000, is too large of an error to be useful for most purposes. It would be very difficult to achieve such an accurate measurement on rough or hilly ground.