The best objective summary of the princess and the goblin is While mining overnight, Curdie overhears a goblin family through a thin wall. Curdie finds out about a goblin physical weakness. He also overhears them planning an attack on the miners, but he does not hear what kind or when. When the goblins leave, Curdie manages to open a passage between their underground tunnels.
The princess and the Goblin is a novel for children written by George MacDonald. The story is about goblins and the princess, who was attacked by goblins, but a Curdie, a stranger save her from them.
Thus, the correct option is 4.
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