To solve this question, we need to determine the number of days it took for Gandhi and his volunteers to cover the 241-mile journey from Sabarmati Ashram to Dandi on foot.
Given that the correct answer is option B) 24, let's go through each option to understand why it is correct or incorrect:
Option A) 20 - This option is incorrect because it does not match the correct answer of 24.
Option B) 24 - This option is correct because it matches the given correct answer.
Option C) 28 - This option is incorrect because it does not match the correct answer of 24.
Option D) 30 - This option is incorrect because it does not match the correct answer of 24.
Therefore, the correct answer is option B) 24. This option is correct because it accurately represents the number of days it took for Gandhi and his volunteers to cover the 241-mile journey.