This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
A 16 year old girl was brought to the psychiatric emergency after she slashed her wrist in an attempt to commit suicide. On enquiry her father revealed that she had made several such attempts of wrist slashing in the past, mostly in response to trivial fights in her house. Further she had marked fluctuations in her mood with a pervasive pattern of unable interpersonal relationship. The most probable diagnosis is 
Select and explain. 
A. Borderline personality disorder, B. Major depression, C. Histrionic personality disorder, D. Adjustment disorder
A: Borderline personality disorder
Answer: A: Borderline personality disorder 
Explanation: Self inflicted injury, suicidal attempt, unstable mood (fluctuating mood) and unstable interpersonal relationship suggest the diagnosis of borderline personality disorder.