Stress response is a non-specific response provided by the body against several stressors including those that cause psychological stress. The general adaptation syndrome is variable as per threat and exhaustion phase is associated with more vulnerability to ill health sometimes may lead to death.
The “general adaptation syndrome” (GAS) consists of a sequence of events that occur to restore the homeostasis in the body against a stressor. The three phases of stress response of general adaptation syndrome are,
• Alarm or flight-or-fight stage
• Resistance stage
• Exhaustion stage
According to Hans Selye's, adaptation to predisposing stress is not a stage of GAS.
Thus, the options (b), (c) and (d) are incorrect.
According to Hans Selye's, adaptation to predisposing stress is not a stage of GAS.
Therefore, the correct option is – a). Adaptation.