Selective pressure impression technique is indicated in firm healthy mucosal covering over the ridge.

The main purpose of covering as much area as possible within functional limits by impression is to distribute the occlusal stresses and increase the peripheral seal.

The following features may raise the suspicion of TB: persistent cough, spontaneous pneumothorax, and haemoptysis

Explanation: In Class III ridge relations, the freeway space must be decreased to accommodate the altered jaw relationship and ensure proper occlusion. This adjustment helps maintain functional stability and comfort for the patient.

Prophylactic spinal irradiation is often used in conditions like acute lymphatic leukemia and non-Hodgkin's lymphoma to prevent central nervous system involvement. However, it is not routinely used in Hodgkin's lymphoma unless there is a specific indication for it.