Arrange the following in the sequence in which they form in the embryo.
(1) Neural plate
(2) Neural tube
(3) Notochord
(4) Primitive streak

A) 1, 2, 3, 4
B) 1, 3, 2, 4
C) 4, 3, 1, 2
D) 4, 1, 3, 2
E) 3, 4, 1, 2

Neural Plate

Region of the dorsal surface of the embryo that is transformed into the neural tube and neural crest.

Primitive Streak

An early structure that forms in the developing embryo, crucial for the process of gastrulation and establishing the body plan of the organism.

Notochord

Small rod of tissue lying ventral to the neural tube. A characteristic of all vertebrates, in humans it becomes the nucleus pulposus of the intervertebral disks.