Principle: Negligence is the breach of a duty caused by a omission to do something which a reasonable person would do or an act which a prudent and reasonable person would not do. An action for negligence proceeds upon the principle that the person has an obligation or duty on the part of the defendant, which he/she breached, leading to damage.
A, a surgeon operated on B. Subsequent to the operation, B complained of pain in his abdomen. On examination, it was discovered that A had left a mop in B 's stomach while Operating.