There was always an imminent danger of the falling of that damaged roof.

A. constant

B. impending

C. remote

D. favourable

Answer: Option B

Solution(By Examveda Team)

Constant : occurring continuously over a period of time.
Impending : be about to happen.
Remote : (of a place) situated far from the main centres of population; distant.
Favourable : expressing approval.
Imminent : about to happen.

Synonym of Imminent is Impending