Concept:The British annexation of Sindh in 1843 was led by Major‑General Charles Napier.Explanation:After the First Anglo‑Afghan War, local Sindhi rulers remained hostile to the British. To suppress this insurrection, the British sent a military force commanded by Major‑General Charles Napier. Napier’s Bombay Army defeated the Sindhi forces and conquered the region in 1843. Following the conquest, the entire territory of Sindh was annexed to the Bombay Presidency of British India. This made Charles Napier the key figure responsible for the annexation, not Sleeman, Lawrence, or Wellington.Answer:B. Napier