Pennsylvania uses which security instrument for most real estate loans?

Deed of trust is incorrect because Pennsylvania does not use this instrument for most real estate loans. Deeds of trust involve a trustee and allow for non-judicial foreclosure, which is not Pennsylvania's standard approach.

Land contracts are incorrect as they are installment sales contracts where the seller retains title until full payment, not security instruments for traditional real estate loans.

Security deeds are incorrect because they are primarily used in Georgia and a few other states, not Pennsylvania as the primary security instrument for real estate loans.