In the Salt Satyagraha led by Mahatma Gandhi, all of the options given participated. Sarojini Naidu, Rajkumari Amrit Kaur, and Kamladevi Chattopadhyaya were all prominent leaders of the Indian Independence Movement and actively participated in various civil disobedience movements. Sarojini Naidu, also known as the Nightingale of India, was a poetess and a key leader in the Salt Satyagraha. Rajkumari Amrit Kaur was a leader in the freedom struggle and also served as the Health Minister of India. Kamladevi Chattopadhyaya was a social reformer and played a significant role in the national movement, including participating in the Salt Satyagraha. Therefore, the correct answer is option 4.