Consider the map given below : The predominant languages spoken in the areas marked A, B, C and D are respectively

The dialect distribution corresponds to a west-to-east progression across the Hindi belt. Area A lies in the north‑western/Western UP Braj region (Mathura–Agra belt), where Brajbhasha is predominant [1]. Area B corresponds to the central Awadh region (Lucknow–Raebareli–Sultanpur area), where Awadhi is spoken. Area C falls in eastern Uttar Pradesh/western Bihar (Gorakhpur–Varanasi belt), the Bhojpuri‑speaking zone. Area D represents the Mithila area of north Bihar (Darbhanga–Madhubani region) where Maithili predominates and is treated as a separate language of the Bihari group. Thus the sequence A–B–C–D is Brajbhasha, Awadhi, Bhojpuri and Maithili, matching option 3.

Sources

1. [1] https://youngintach.org/files/dialects-of-hindi-language.pdf