What will be the output of the command prompt l p g?

Answer: Option B

The command prompt string $l$p$g typically represents:
$l stands for the current drive letter, which is usually C.
$p stands for the path separator, which is typically \.
$g stands for the command prompt symbol, which is usually >.

When you combine these components:
$l$p$g translates to C:\>.

Now, let's review the options provided:

Option A: - This format < > is not standard for representing the command prompt.
Option B: C:\> - This matches the expected output format of C:>, which is correct.
Option C: C:\>> - This includes an extra > which is not standard in DOS for the command prompt.
Option D: C:<\> - This format < > is not standard for representing the command prompt.

Therefore, upon reviewing again, Option B: C:\> is indeed the correct answer, representing the expected output of the command prompt string $l$p$g in a DOS environment.