Question

What is the structure of DNA polymerase III ?

Here's a link to the details of the question: https://i.redd.it/dqlc8g51k3fy.png

Answer 1

Both images are correct. The first one from Snustard and Simmons show a single molecule of polymerase.
The image from Lehninger represents two molecules, which are joined at the region of clamp loader. It allows their simulatnous functioning and replication of the two strands.