Concept:Vowels are coded with fixed values: A=1,E=2,I=3,O=4,U=5, and consonants use their normal alphabet positions.Explanation:Check ROBOT: R=18,O=4,B=2,O=4,T=20→1842420=1842420.Check RUPEE: R=18,U=5,P=16,E=2,E=2→1851622=1851622.For LAPTOP: L=12,A=1,P=16,T=20,O=4,P=16.Join these values: 1211620416=1211620416.Answer:Option C: 1211620416.