Select the most appropriate option to fill in the blank.
She was so busy ______writing that when the maid came ______she didn’t hear her.

Correct option is C

The correct option to fill in the blank is (c) in, in.
· "In writing" is the correct phrase to indicate someone is engaged in the activity of writing. Similarly, "when the maid came in" correctly describes the maid entering the room. (Hindi meaning: "लेखन में", "अंदर")
Explanation of incorrect options:
· Option (a) with, by: "With writing" is incorrect because "with" doesn’t convey the sense of being engaged in an activity. "Came by" suggests passing by rather than entering.
· Option (b) to, in: "To writing" is incorrect as "to" isn’t used to describe being occupied with an activity. The second "in" is correct, but the first part makes this option incorrect.
· Option (d) at, up: "At writing" is incorrect because "at" isn’t used to describe being busy with an activity. "Came up" suggests approaching someone, not necessarily entering a room, making it contextually inappropriate.