To create a new directory called "flower" in UNIX, you need to use the "mkdir" command. This stands for "make directory" and is used to create a new directory in the current location.
Let's go through each option and explain why it is right or wrong:
A. newdir flower: This option is incorrect. There is no "newdir" command in UNIX. The correct command to create a new directory is "mkdir".
B. mkdir flower: This option is correct. By typing "mkdir flower", a new directory called "flower" will be created in the current location.
C. crdir flower: This option is incorrect. There is no "crdir" command in UNIX. The correct command to create a new directory is "mkdir".
D. crtdir flower: This option is incorrect. There is no "crtdir" command in UNIX. The correct command to create a new directory is "mkdir".