Which sentence from the excerpt provides evidence that the narrator may be unreliable?

Question 6 options:

My immediate purpose is to place before the world, plainly, succinctly, and without comment, a series of mere household events.

From my infancy I was noted for the docility and humanity of my disposition.

I was especially fond of animals, and was indulged by my parents with a great variety of pets.

Mad indeed would I be to expect it, in a case where my very senses reject their own evidence.