Answer:
His behavior shows that he is suffering from Narcissistic personality disorder.
Step-by-step explanation:
Narcissistic Personality Disorder:
It is such a personality disorder in which a person develops traits like that of a narcissist.
- The person tends to consider himself or herself most important and always correct.
- The persons doesn't show care for others and doesn't concern for others.
- The person wants that everyone should praise him or her and nobody has the right to criticize.
In our case, the 17- year male is showing such personality traits like he is arrogant and boastful and doesn't show care for others.