The correct simple form of the sentence- She danced as if she were an expert dancer, ------ is:

ক. "She is dancing with an expert dancer."

- This option changes the tense of the sentence to present continuous ("is dancing") which doesn't match the original past tense construction ("danced").

- Additionally, it introduces the idea that she is currently dancing with an expert dancer, which is not what the original sentence conveys.

খ. "She is dancing like a expert dancer."

- This option also changes the tense to present continuous ("is dancing"), which doesn't match the original past tense construction ("danced").

- It contains a grammatical error: "a expert dancer" should be "an expert dancer."

গ. "She danced like an expert dancer."

- This option maintains the past tense ("danced") consistent with the original sentence.

- It correctly uses "like" to indicate comparison.

- It uses the correct article "an" before "expert dancer."

ঘ. "She danced an expert dancer."

- This option is grammatically incorrect. It doesn't convey the intended meaning and is syntactically awkward.

Therefore, the correct simple form of the sentence is:

গ She danced like an expert dancer.

Explanation:

- This option maintains the correct past tense form ("danced").

- It correctly uses "like" for comparison.

- It uses the appropriate article "an" before "expert dancer."