What is the name of the memory card which is conceptually related to the smart card but is similar to the video disk?

The correct answer is: D. Optical card

An optical card is a type of memory card that uses optical storage technology to store data. It is similar to a smart card in that it is a small, portable device that can be used to store and access data, but it is different in that it uses optical technology instead of magnetic technology. Optical cards are often used in applications where security and durability are important, such as in access control systems and electronic passports.

Laser card, Master card, and Visa are all types of credit cards. They are not related to optical cards.