4. The following statement describe comets origin EXCEPT.

a. Short period comets comes from the Kuiper belt which is
just beyond Neptune's orbit

b. Long period comets comes from the Oort cloud which is
beyong our solar system.

C. Halley's comet is an example of a long period comet that
comes from the Oort cloud,

d. Halley's comet, the most famous comet of the 20th
century is the only known short period comet.