What is the difference between PCI and PCle?

PCle uses point$-$to$-$point serial links, and pCle can handle muitiple links to exchange data on the same connector.

PCle uses poink$-$to point serial links, and PCI can handle mulciple links to exchange data or the same connector.

PCI uses point$-$to$-$poink serial links, and PCI can handle multiple links to excnange data on the same connector.

PCl uses point$-$lo$-$point serlar links, and PCle can handle muitiole links to exchange data on the same connector.