Can a seller see if I am approved for a mortgage through multiple lenders?

[Jeff Daring]

I am under contract for my my first property, which would also be my primary residence, and was pre-qualified/approved through lender A which is on the contract. There is a mortgage contingency on the contract. If I am also pre-qualified/approved with two other lenders, B and C, and lender A denies financing, can the seller see that I am approved with other lenders?  Essentially I want to know if the deal can be killed at my discretion as soon as lender A denies financing or if I would then have to get denial letters from lenders B and C as well to kill the deal.