What serpent had regenerating heads?

• A. Dragon
• B. Sea Serpent
• C. Hydra of Lerna
• D. Giant Serpent

Answer: (C)

The main idea here is recognizing a mythical creature whose heads regrow when they’re severed. The Hydra of Lerna is the one known for this trait: when you cut off a head, two more would often grow back from the wound, making it extraordinarily difficult to defeat. That regenerative ability is the defining feature that sets Hydra apart from other serpent-like beings. In the myths, Heracles eventually stops the regrowth by cauterizing the neck stumps, sometimes with the help of his companion, and he also has to deal with the Hydra’s immortal head. This combination of multiple heads and the special immortal head is what makes the Hydra the serpent associated with regenerating heads. The other options—dragons, sea serpents, and giant serpents—are not described with this head-regeneration behavior, so they don’t fit this particular trait.