4. Which one of the false positive responses from a. Calcific obliterations in the root canals b. Partial pulp necrosis c. Recently traumatized teeth d. Immature apex e. Drugs that increase patient's threshold for pain

The false positive response from the given options is:<br /><br />e. Drugs that increase patient's threshold for pain<br /><br />False positive responses refer to situations where a test or diagnostic procedure incorrectly indicates the presence of a condition or abnormality when it is actually not present. In this case, drugs that increase a patient's threshold for pain can lead to false positive responses in diagnostic tests or procedures related to pain perception, as the patient may not feel pain or discomfort during the test despite having a condition or abnormality that causes pain. This can result in a false positive diagnosis or indication of a condition or abnormality that is not actually present.