Kamala Devi Chattopadhyay, a prominent social reformer and freedom fighter, was indeed involved in various movements during India's struggle for independence. If historical sources indicate her role in persuading Mahatma Gandhi to not restrict the Dandi March protest to men alone, it would likely be based on her commitment to gender equality and inclusion in the independence movement.

During the Indian independence movement, there were efforts to involve women actively in various protests and campaigns. Kamala Devi Chattopadhyay, known for her work in promoting women's rights, social reform, and cultural revival, could have advocated for the inclusion of women in the Dandi March to make a statement about the broader participation of the population in the fight against British colonial rule.

So, the correct option is [3].