The answer to this question depends on the specific order a nun belongs to.
Generally, most Catholic orders prohibit their nuns from drinking alcohol. This is because the Catholic Church encourages abstinence from alcohol as part of a life of prayer and service.
However, there are some orders that allow nuns to drink alcohol in moderation. These orders might have different rules and interpretations of the Church's teachings.
It's important to remember that each religious order has its own set of rules and guidelines.
Therefore, whether or not a nun can drink alcohol depends on the specific order she belongs to.