Misc: What two colours are most colour blind people unable to distinguish between?

Questions

Widely used designation in the United States, Canada, and several other countries for the association of more than 2000 community-based organizations that work to meet local health and human-care needs?

Wiesmuller what was canada's first national park?

Wilco name the only animal with retractable horns?

what's blue, comes out in spring, and smells like hyacinth?

Willie What do table tennis players change after five points?