his best

[azz]

I am listening to a song. My friend walks into to room and asks me:
-Is that George Benson?

Can I say:
a. Yes. In my opinion this is his best.
instead of
b. Yes. In my opinion this is his best song.
?

I am not sure that 'the best' can replace a singular noun (his best song). My feeling is that 'the best' makes one think that one is talking about 'the best ones' and not 'the best one'.

Many thanks.

[Wizard of Oz]

In that context I am sure I know what you mean.

WoZ who likes George Benson too

[Phil White]

It could and would undoubtedly be said, but ellipsis of this kind only usually occurs when the noun concerned has been mentioned explicitly already. In this case, the notion "song" or "track" is so strongly implicit that you can get away with it.