With no context, the first one would be "student". However, my first instinct was to ask "in what context?".
If I'm on the train, it might be "travelling from/to Wales/Birmingham. Or "tired" or "annoyed with slow trains" or "trying to read, please don't ask me stupid questions".
If I'm in town, it might be "no I'm not going to give you money/fill in your survey/etc", "looking for this shop", "looking for this item", "going towards the organic stall", "feeling weird being the only non-Chinese person being in the Chinese supermarket", "a customer of HSBC", "I can't afford that so don't ask me", "too busy to talk to people asking weird questions", etc.
If I'm in university, it'll probably be "final year" or "Natural Sciences".
If someone is trying to find out stuff about me, it might be "female", "single", "22", "straight", "brown eyes, dark-blond hair", etc...