Learn English – Preposition for “Alternative”

meaningprepositions

I've found out that there are several prepositions for the word alternative that all seem to be correct, however, I think there should be a best choice. Do these prepositions affect the meaning in some way?

For:

Ensure that the text alternative for CAPTCHA images identifies the type of task and what is required from the user to complete it

To:

This solution is far from perfect, but it is a potential alternative to Captcha nonetheless.

Of:

In this tutorial, we discussed an alternative of captcha, a plugin called GASP (Growmap Anti spambot Plugin).

Personally, as in my recent article, I do prefer to use "To" as preposition.

Best Answer

It's a black-tie event, where...
...the alternative for women is an LBD.
...the alternative to a black tie is a dark blue one.
...the alternative of a spinning bow tie will be rejected by the doormen.

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