Sweetest variety of mango:

Correct option is B

Chausa is known for its exceptional sweetness and flavor, making it one of the most popular mango varieties in India.

Explanation of other options:
(a) Alphonso: Known for its rich aroma and smooth texture but less sweet compared to Chausa.

(c) Langra: Has a distinct taste but not the sweetest.

(d) Deshehari: A sweeter variety but still less sweet than Chausa.