A person showing unpredictable moods, outbursts of emotion, quarrelsome behaviour and conflicts with others is suffering from

The correct option is B Borderline Personailty Disorder (BPD)

Borderline personality disorder is a serious psychiatric illness. It is a serious emotionally unstable personality disorder. The main feature of this disorder is a pervasive pattern of instability in interpersonal relationships, self-image and emotions. It is characterized by an unpredictable mood or mood swings, quarrelsome behaviour and conflicts.

So, the correct answer is 'Borderline personality disorder (BPD)'.