First of all, you need to know what the sentence above means.
"In general, to enter a car and unlock it, you need ___."
The options are llaves (keys), antenas (antennas), espejos (mirrors), and tanques (tanks).
So obviously, based on the context, the correct answer is going to be llaves.
1. Saber, conocer
2. Conozco, sabe
3. Sabe, conoce
4. Conocen, saben
5. Conoces, sé
It would be Nosotros SOMOS de Puerto Rico. This is saying "We are from Puerto Rico"
Hope this helps!
