What is the full form of PTSD?

The correct option is Post Traumatic Stress Disorder.

Step-by-step Explanation:

PTSD stands for Post-Traumatic Stress Disorder. Let's break down the meaning of each word to understand the term fully:
1. Post: This prefix means "after" or "subsequent to," indicating that the condition occurs following a specific event.
2. Traumatic: This refers to a deeply distressing or disturbing experience (a trauma), such as physical assault, natural disasters, accidents, or military combat.
3. Stress: This describes the intense psychological and physiological strain or tension experienced by the individual.
4. Disorder: This indicates that the symptoms interfere significantly with a person's daily functioning and mental well-being.

Therefore, combining these terms, PTSD is a mental health condition that is triggered by experiencing or witnessing a terrifying or traumatic event, leading to persistent stress and disruption in daily life.