Question

where does each half of the visual field get segregated so that it reaches the opposite hemisphere of the brain?
occipital lobe
lateral geniculate nucleus
optic chiasma
hypothalamus

Explanation:

The optic chiasma is the location where the optic nerves partially cross. This crossing (decussation) allows each half of the visual field to be segregated so that it reaches the opposite hemisphere of the brain. The occipital lobe is the visual processing center but does not segregate the visual field. The lateral geniculate nucleus is a thalamic nucleus that relays visual information but is not the site of segregation. The hypothalamus is involved in various regulatory functions (e.g., hormone release, body temperature) and not visual field segregation.

Answer:

Optic chiasma