Final answer:
The correct word is 'al lado'. It means 'next to' in English.
Step-by-step explanation:
The correct word to complete the sentence is al lado.
'Hay una universidad al lado del museo' means 'There is a university next to the museum'.
This phrase indicates the location of the university in relation to the museum, showing that they are positioned next to each other.
Learn more about word completion in a Spanish sentence