Which of the following virus is a script that attaches itself to a file or template?

A.
E-mail virus

B.
Boot sector

C.
Macro virus

D.
Trojan horse

Explanation:

A macro virus is a macro or script that attaches itself to a file or template. When the file is loaded,
the instructions of the macro or script are executed.

Answer option B is incorrect. A boot-sector virus infects the boot record on hard disks and floppy
disks, which is used to start the computer. When the computer is turned on or restarted, the virus is
automatically executed. An infected boot disk may stop the computer from starting up.
Answer option A is incorrect. An e-mail virus moves around in e-mail messages, and usually
replicates itself by automatically mailing itself to many people in the their e-mail address book.
Answer option D is incorrect. A Trojan horse program can contain viruses, but it is not a virus itself.
Reference: “http://en.wikipedia.org/wiki/Macro_virus_(computing)”