Choose the adjective.

Let's look at the meaning of the marked option:
- Cerulean (adjective)- deep blue in color like a clear sky
- Cerulean= আকাশনীল।
Let's look at the meanings of the other given options:
- Quickly (adverb)- at a fast speed; rapidly
- into (preposition)- expressing motion or direction.
- Somewhere (adverb)- in or to someplace
Hence, from the given meanings, we find that Cerulean is the correct choice.