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For a Rails validator, how would you define an error message for the model attribute address with the message "This address is invalid"?

 a. model.errors = This address is invalid

 b. errors(model, :address) << "This address is invalid"

 c. display_error_for(model, :address, "This address is invalid")

 d. model.errors[:address] << "This address is invalid"

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For a Rails validator, how would you define an error message for the model attribute address with the message "This address is invalid"?

Correct answer is :-  model.errors[:address] << "This address is invalid"

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