1

Given that "A" is one set and "B" and "C" are another set, how should the following phrase be punctuated correctly?

A and B and C

2

You can write the matched pair with an ampersand instead of the word and to indicate that they are closer than the other items in the list:

We ordered spaghetti and fish & chips.

This usage isn't universal, although Wikipedia notes some specific cases where it's preferred:

In film credits for stories, screenplays, etc., & indicates a closer collaboration than and. The ampersand is used by the Writers Guild of America to denote two writers collaborating on a specific script, rather than one writer rewriting another's work. . . .

The ampersand can be used to indicate that the "and" in a listed item is a part of the item's name and not a separator (e.g. "Rock, pop, rhythm & blues, and hip hop").

If you're working with a particular style guide, it may have advice on whether ampersands are preferred (or forbidden) for these kinds of cases.

1

The only way to do it as it stands is A, and B and C. Whether that would be clear enough depends on the context. If it wasn't, then you might want to think of some other way of putting it.

  • 'Cornflakes, and bacon and eggs' would almost always be read the obvious way because bacon and eggs is such a common collocation. 'Jill and I ordered fish, and chips and peas' probably needs a 'respectively'. You may be forced into 'The four lads ordered fish and chips; fish, chips and peas; fish, chips, peas and gravy; and fish and peas' if you ever write up your diary in a restaurant. – Edwin Ashworth Oct 15 '13 at 7:58
  • Thanks a lot. I have another question related to punctuations. Please tell me whether the following sentences are correct or not. 01) Innodata is a company that provides BPO and KPO services. 02) Innodata is a company providing BPO and KPO services. 03) Innodata is a company, providing BPO and KPO services. – Nimal Nonis Oct 15 '13 at 10:51
  • 2
    Any new question should be created as a NEW question - not within an existing question. BUT a question of the nature "Is this correct?" is off-topic on this site because it is deemed to be merely 'proofreading'. If you can explain why you think a sentence may be wrong or which particular aspect you are having a problem with, then the question my be acceptable. However, you may find English Language Learners more suitable for your basic questions. – TrevorD Oct 15 '13 at 11:24
-1

I personally would state that when you are using multiple expressions, in this particular case, you should use the function of "and" in the last aspect.

In your example, A and B and C.

I would say A, B and C.

Here is my own example, could groups 1, 4, 6, 9 and 7 report to office 23.

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