The accident occurred due to his lapse.

A. haste

B. error

C. ignorance

D. carelessness

Answer: Option B

Solution(By Examveda Team)

Haste : excessive speed or urgency of movement or action; hurry.
Error : a mistake.
Ignorance : lack of knowledge or information.
Carelessness : failure to give sufficient attention to avoiding harm or errors; negligence.
Lapse : a brief or temporary failure of concentration, memory, or judgement.

Synonym of Lapse is Error