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

List-I	List-II
(Sentences)	(Verb Forms)
---	---
(A) As a ritual, Mona ______ every day for two hours to perfect her skill.	(I) singing
(B) I don't want to miss the concert as Mona will be ______ my favourite songs.	(II) had sung
(C) Mona ______ since she was five years old.	(III) sings
(D) Mona ______ the old numbers so many times that she knew the songs by heart.	(IV) has been singing

Choose the correct answer from the options given below:

(A) "As a ritual, Mona ______ every day" → (III) sings - Habitual/routine actions require simple present tense.

(B) "Mona will be ______" → (I) singing - Future continuous tense needs the present participle (-ing form).

(C) "Mona ______ since she was five years old" → (IV) has been singing - "Since" + past time point requires present perfect continuous to show an action continuing from past to present.

(D) "Mona ______ so many times that she knew" → (II) had sung - Past perfect tense is needed because the singing happened before another past action (knew).

Hence, Option 4: (A) - (III), (B) - (I), (C) - (IV), (D) - (II) → This correctly applies the rules of tense usage: simple present for habits, present participle for continuous forms, present perfect continuous for actions spanning from past to present, and past perfect for actions completed before another past event → correct