Please, please give us more background!
What book and what was the exercise? Are there options?
The OP sentence doesn't sound 'wrong' to me. It depends on the context. It would be very wrong as the closing of a letter, instead of 'Best Wishes'.
I'm writing a letter of condolence on a death at the moment. I will use the sentence in that. I will probably never see the family again.
[This post and the following ones have been added to a previous thread in which the same question had been asked. DonnyB - moderator]
This question was asked in an exam in India as...
In the following questions, some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error. The number of that part is the answer. If a sentence is free from error, your answer is (4) i.e. No error.
My best wishesare alwayswith you.
As per the official answer key, the error is in "part 1" but I don't know what it is.
The cliche I would prefer to use is "My thoughts are always with you". I keep my best wishes for a special occasion, as in Best wishes for your birthday next month/Best wishes for a speedy recovery, etc.
But I don't know whether the person who set the question was looking for the most common collocation or simply a correct sentence.