Concept:This question is based on a tourism scheme announced in the Union Budget by the Finance Minister.Explanation:Finance Minister Nirmala Sitharaman announced the 'Dekho Apna Desh' scheme.Under this scheme, a total of 50 destinations across the country will be selected.These destinations will be developed as a complete tourism package in a challenging mode.Therefore, the correct number to fill in the blank is 50.Answer:Option A — 50