Which is the correct grammar usage: how to best apply or how best to apply?

The ';infinitive'; is the pure form of a verb: to be, to run, to sit, to apply, etc. Putting a word between ';to'; and the verb is called ';splitting the infinitive.';





';To best apply'; is a split infinitive- best is between ';to'; and ';apply';. They should stay together like in the second example: how best to apply.Which is the correct grammar usage: how to best apply or how best to apply?
';how best to apply'; is correct because it is not a split infinitiveWhich is the correct grammar usage: how to best apply or how best to apply?
How best to apply is the correct one/...//...........
how best to apply
how best to apply