The total number of amines (primary + secondary + tertiary, open-chain, structural isomers) of formula $C X_{5} H X_{13} N$ is

Answer: C

Primary: 8 (pentyl groups). Secondary (R + R' = 5 C): methyl with butyl (4) and ethyl with propyl (2) = 6. Tertiary: methyl-methyl-propyl (2: n-propyl, isopropyl) and methyl-ethyl-ethyl (1) = 3. Total 8 + 6 + 3 = 17.

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The total number of amines (primary + secondary + tertiary, open-chain, structural isomers) of formula CX5​HX13​N is

Answer: C

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The total number of amines (primary + secondary + tertiary, open-chain, structural isomers) of formula $C X_{5} H X_{13} N$ is