Which statement correctly describes Wajib 15 in the author's list?

The Wajib Acts of Prayer, Part 2: Wajibat 5–18

• The wording of Takbir is designated for opening every prayer, not only Eid prayer.
• Only Eid prayer must begin with Takbir.
• Every prayer must begin with Tashahhud.
• The opening wording is optional in every prayer.