Haikouichthys lanceolata is one of the oldest fossil chordates known. It shares with lampreys some specific features of the eye and eye muscles. From this, we can infer that Haikouichthys probably possessed .

A. vertebrae and jaws
B. a cranium and vertebrae, but no jaws or paired fins
C. a cranium but no vertebrae
D. segmental muscles but no cranium

Option (B) is Right Answer

Explanation:

    (B) A cranium and vertebrae, but no jaws or paired fins

Haikouella fossils are found in relationship with Haikouichthys and Myllokunmingia that by consensus are viewed as the oldest seasoned known genuine craniates and probably the oldest fishesHaikouichthys is a terminated types of craniate which had a place with group of animals called fishIt had been accepted that Haikouichthys have lived 525 million years prior during the Early Cambrian time periodHaikouichthys is about 2.5 cm (1 in) long and is smaller than Myllokunmingia, another putative chordate that originates from similar beds

Number one is sinkholes may form from water erosion

Idk