Fill in the blanks in the sentences in List-I with the correct verb forms from List-II:

List-I	List-II
(Sentences)	(Verb forms)
(A) It _________ since early morning.	(i) rains
(B) Last week it ____ cats and dogs.	(II) has been raining
(C) In north India it usually ___ during the months of July and August.	(III) had been raining
(D) It __________ for two hours when suddenly the rainbow was spotted.	(IV) rained

Choose the correct answer from the options given below:

Option 1 -> Incorrect verb tenses: (A) needs continuous aspect with "since," not simple present; (B) needs simple past for "last week," not past perfect continuous.

Option 2 -> (A) "has been raining" for action from past to present; (B) "rained" for completed past action; (C) "rains" for habitual action; (D) "had been raining" for past continuous before another past event.

Option 3 -> Incorrect: (A) needs present perfect continuous with "since," not simple past; (B) needs simple past, not present perfect continuous.

Option 4 -> Incorrect tense sequence: (A) needs present perfect continuous, not past perfect continuous; (B) needs simple past for specific past time.

Hence, Option 2: (A) - (II), (B) - (IV), (C) - (i), (D) - (III) -> Each sentence requires specific tense: "since early morning" signals present perfect continuous (II), "last week" needs simple past (IV), "usually" indicates habitual present (i), and "for two hours when...was spotted" requires past perfect continuous (III) -> correct