“If A is for Apple and B is for Banana, then what is C for?”/“Plastic explosives.”

One way of teaching the alphabet is to say, “A is for Apple, B is for Banana, C is for Cookie…” A riddle is:
 
Q: If A is for Apple and B is for Banana, then what is C for?
A: Plastic explosives.
       
The C-4 plastic explosives pun was posted on the newsgroup uk.local.glasgow on June 10, 2005, and on Reddit—Funny on November 10, 2010.
 
 
Wikipedia: C-4 (explosive)
C-4 or Composition C-4 is a common variety of the plastic explosive family known as Composition C. A similar British plastic explosive, based on RDX but with different plasticizer than Composition C-4, is known as PE-4 (Plastic Explosive No. 4). C-4 is composed of explosives, plastic binder, plasticizer to make it malleable, and usually a marker or odorizing taggant chemical.
       
Google Groups: uk.local.glasgow
If A is for apple…
Blackthorn
6/10/05
“Mr_K”

wrote in message
news:d8cohv$t20$1$8302bc10@news.demon.co.uk…
> and B is for Bee
> what is c for?
 
A type of plastic explosive?
 
Reddit—Funny
Q. A is for apple, B is for ball. What is C for? (self.funny)
submitted November 10, 2010 by untitledghost
Plastic explosives.
   
Twitter
Blogger’s Help
@blogging_123
funny | Q. A is for apple, B is for ball. What is C for?: Plastic explosives. submitted by untitledghost [link]...  http://if10.net/01c
5:27 PM - 21 Nov 2010
     
Twitter
Hester Mofet
@lishnetzy
A is for Apple. B is for Ball. What is C for? | Plastic explosives.
5:30 PM - 24 Mar 2011
   
Reddit—Jokes
If A is for Apple and B is for Banana then what is C for?
submitted May 5, 2018 by sheenweedy
Plastic Explosives.
COMMENTS
ACuteMonkeysUncle
C is for cookie, that’s good enough for me.