1st lien on a property to 1st recording or 1st mortgage execution

[Jean-marc Cabrol]

As I realize the answer may depend on the State of the property, I am wondering if the 1st lien on a property is given to the 1st mortgage recorded, or the oldest mortgage document execution.

Basically if I have 2 mortgages on my property from lender A and lender B, regardless of the amount.

A is signed on February 15

B signed on March 15,

however B is recorded right away on March 18th and A is recorded on March 30th.

Who has 1st lien position on the property in the court of law?

Thank you