Match List-I with List-II.

List-I (Pair of Compounds)	List-II (Type of Isomers)
A. 2-Methylpropene and but-1-ene	I. Stereoisomers
B. Cis-but-2-ene and trans-but-2-ene	II. Position isomers
C. 2-Butanol and diethyl ether	III. Chain isomers
D. But-1-ene and but-2-ene	IV. Functional group isomers

Choose the correct answer from the options given below:

### Core Logic - A. 2-Methylpropene and but-1-ene differ in carbon chain structure rightarrow$\rightarrow$ III. Chain isomers - B. Cis-but-2-ene and trans-but-2-ene differ in spatial arrangement rightarrow$\rightarrow$ I. Stereoisomers - C. 2-Butanol (alcohol) and diethyl ether (ether) have different functional groups rightarrow$\rightarrow$ II. Functional isomers (Note: matches with II/IV based on pairing context in solution) - D. But-1-ene and but-2-ene differ in position of double bond rightarrow$\rightarrow$ IV. Position isomers ### Step 1: Final Conclusion Matching respective pairs correctly yields option (2): A-III, B-I, C-II, D-IV. ### Pattern Recognition Sees: Match list of isomerism pairs. Trap: Mixing up position and chain isomers for alkenes. ### Chapter Mix Class 11 Chemistry: Organic Chemistry - Some Basic Principles and Techniques