For this case we have the following expression:
Las lámparas __________ en el comedor.
What we should do is fill in the blank with the correct verb.
The verb for this case is:
Estar
The verb must have the following characteristics:
1) Be in simple present:
2) Be in the third person plural
Therefore, the correct sentence in Spanish that meets these characteristics is:
Las lámparas están en el comedor.
Answer:
3) están