This paired question tests two independent historical relationships and requires both to be correct in the stated order. Chittaranjan Das was elected the first Mayor of Calcutta under the 1923 municipal legislation in 1924. Subhas Chandra Bose served as the corporation's Chief Executive Officer, not its mayor; the original row confused these offices. Das from other names in the period: the question tests one defined act, location or institutional decision, not overall prominence. This development forms part of the changing national movement, in which constitutional negotiation, mass mobilisation, boycott, civil disobedience and revolutionary action followed different strategies; Exact dates and organisational decisions matter because related sessions For statement two, the supported answer is Bardoli Satyagraha. Vallabhbhai Patel organized the Bardoli Satyagraha in 1928 in Bardoli taluka of Gujarat against a 30% hike in land revenue. Reading the stem closely separates Bardoli Satyagraha from other names in the period: the question tests one defined act, location or institutional decision, not overall prominence. This development forms part of the changing national movement, in which constitutional negotiation, mass mobilisation, boycott, civil disobedience and revolutionary action followed different strategies; Exact dates and organisational decisions matter because related sessions or phases often performed different functions, a distinction applied here to Bardoli Satyagraha. Neither Champaran Satyagraha Therefore the correct ordered pair is C. Das followed by Bardoli Satyagraha. An option containing only one correct component must be rejected because the stem asks for a complete two-part match.