This paired question tests two independent historical relationships and requires both to be correct in the stated order. Sukumar Sen was India's first Chief Election Commissioner. Chronology resolves the item: 1951–52 occupies the position required by “India's first general election to the Lok Sabha was conducted during which period?”, while a merely famous contemporary name would not satisfy every part of the stem. 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 1951–52. The alternatives need separate labels: For statement two, the supported answer is Try European British subjects. The Ilbert Bill was introduced by Law Member Courtenay Ilbert in 1883 under Viceroy Lord Ripon. It proposed to allow Indian district magistrates and judges to try European British subjects. Europeans in India strongly protested against the bill arguing that being tried by Indians was beneath their dignity. The bill was eventually passed in a watered-down form. Reading the stem closely separates Try European British subjects 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 Therefore the correct ordered pair is 1951–52 followed by Try European British subjects. An option containing only one correct component must be rejected because the stem asks for a complete two-part match.