The most commonly used type of query is the ________ query

Which one of the following best describes a polymorphic virus?

a. A virus that changes its form each time it is executed b. A virus inserted into a Microsoft Office document such as Word or Excel c. A virus that infects EXE files d. A virus that attacks the boot sector and then attacks the system files

The array_unique() function does not renumber the indexes after removing duplicate values in an array.

Answer the following statement true (T) or false (F)