Explanation:

The correct answer is option B - Might.

"Might" expresses possibility or uncertainty about something happening. In the given sentence, the speaker is unsure about visiting Delhi. They are not completely certain about their decision. Let's analyze the options to understand why "might" is the correct answer.

a) Must: "Must" implies a strong obligation or necessity. It indicates a high level of certainty. However, in the given sentence, the speaker is not expressing a strong obligation or necessity to visit Delhi.

b) Might: "Might" indicates possibility or uncertainty. It suggests that there is a chance of the action happening, but it is not definite. This aligns with the speaker's uncertainty about visiting Delhi.

c) Should: "Should" expresses recommendation or advice. It implies that something is the right thing to do. However, in the given sentence, the speaker is not seeking advice or expressing what is the right thing to do.

d) None of these: This option can be chosen if none of the given options accurately conveys the intended meaning. However, in this case, option B - Might - accurately captures the speaker's uncertainty about visiting Delhi.

Therefore, option B - Might - is the correct answer as it reflects the speaker's uncertainty and possibility of visiting Delhi.