Final Answer:
Pinpoint, purplish hemorrhagic spots on the skin are called petechiae (option 3).
Step-by-step explanation:
Petechiae are small, reddish-purple spots that appear on the skin due to bleeding beneath the skin's surface. These pinpoint hemorrhages result from capillaries breaking and leaking blood. Petechiae can be caused by various factors, including trauma, certain medical conditions, or underlying bleeding disorders. Unlike acne, which is characterized by inflamed sebaceous glands and comedones, petechiae are distinctive for their small size, purplish color, and association with bleeding into the skin. Leukoplakia, on the other hand, is a condition involving white patches on mucous membranes, not related to hemorrhagic spots.
In conclusion, the correct term for pinpoint, purplish hemorrhagic spots on the skin is petechiae (option 3).