Among the options provided, the gesture that typically conveys arrogance is d. Pointed finger.
Pointing directly at someone can be perceived as confrontational or aggressive, which may come across as arrogant. It can imply a sense of dominance or superiority over the person being pointed at. Additionally, it can be seen as disrespectful or dismissive of the other person's perspective.
The other gestures listed—shoulder shrug, jointed fingertips, and hands swinging loosely—are less likely to convey arrogance. They are more neutral or ambiguous in terms of their connotations and are less likely to be interpreted as displaying arrogance.