Anxiety is a future oriented response that people experience when encounter a new situation or anticipate a life-changing event like marriage.
Anxiety disorder as the name indicates it is the extreme feeling of fear and anxious for even a small issue. Thus it is combination of mental illness and distress that makes one carry on normally in their lives.
The fear and anxious are all the reactions in a body that people contain during a situation.
Hence the options b and c are not correct.
Anxiety consists of three components.
• The physiological components that includes sympathetic nervous system.
• The cognitive component of negative thoughts and a subjective feeling of anxious distress
• The behavioral component that is defined by escape or avoidance.
Hence the correct option is .