Under Section 80 of the Civil Procedure Code, a _____ notice in writing is required to be delivered before institution of a suit against the Government.

Option (3) is incorrect: No such provision Option (4) is correct: Under Section 80 of the Code of Civil Procedure, a suit against the Central Government or against a public officer shall not be instituted until the expiration of two months, next after the notice in writing has been delivered to or left at the office of the Secretary of that Government or of public officer.