Which among the following Mill's canons can be used to explain the discovery of the planet Neptune ?

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AMethod of residues

BMethod of difference

CMethod of agreement

DMethod of concomitant variation

Answer:

Observation: Uranus's motion deviated from predictions.
Known Causes: Effects of other planets on Uranus's motion were accounted for.
Residue: Unexplained motion remained after subtracting known effects.
Unknown Cause: Residual motion attributed to unknown planet (Neptune).
Confirmation: Neptune's discovery confirmed the prediction.

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