Final answer:
The correct word to complete the sentence is 'encima de la puerta'.
Step-by-step explanation:
The correct word or expression to complete the sentences is B. encima de la puerta. This means 'above the door' in English. So the complete sentence would be 'El reloj está encima de la puerta' which translates to 'The clock is above the door'.
Learn more about Completing sentences in Spanish