Complete the sentences given in List-I with the appropriate verb forms given in List-II:

List-I	List-II
(Sentences)	(Verb forms)
(A) He promised______ me a post in his department.	(I) have given
(B) I ______ my best years to the service of the nation.	(II) gave
(C) His services were terminated as he _____trouble to the authorities.	(III) to give
(D) Atul always _____ his hundred percent to the task at hand.	(IV) had been giving

Choose the correct answer from the options given below:

Option 1 -> Incorrect matching: (A) requires infinitive "to give" after "promised", not simple past "gave".

Option 2 -> (A)-(III): "promised to give" (infinitive after promise); (B)-(I): "have given" (present perfect for completed action); (C)-(IV): "had been giving" (past perfect continuous for ongoing past action before termination); (D)-(II): "gave" (simple past for habitual action).

Option 3 -> Incorrect: (A) cannot take "have given" after "promised"; needs infinitive form.

Option 4 -> Incorrect: (D) should be "gave" not "had been giving" for habitual actions with "always".

Hence, Option 2: (A) - (III), (B) - (I), (C) - (IV), (D) - (II) -> The verb "promise" requires an infinitive form (to give); "have given" shows present perfect for dedicating years; "had been giving" indicates past perfect continuous for ongoing trouble before termination; "gave" suits habitual past action with "always" -> correct