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Mental Health
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A person showing unpredictable moods, outbursts of emotion, quarrelsome behaviour and conflicts with others is suffering from -Borderline personality disorder (BPD) is an emotionally unstable personality disorder.
Its characteristic features are unpredictable and rapidly changing moods, sudden outbursts of emotion, impulsive and quarrelsome behaviour, and frequent conflicts with others, leading to unstable relationships.
These are exactly the symptoms described in the question.
Schizophrenia is marked by distorted thoughts, hallucinations and delusions, and a loss of contact with reality.
Mood disorders involve long-lasting disturbances of mood, such as depression or mania, and not quarrelsome conflicts.
Addictive disorders are related to dependence on drugs or alcohol.
So the person is suffering from borderline personality disorder (BPD).