Which of the following is the correct name according to IUPAC rules?

Step-by-step solution

(1) HC C - CH = CH₂ : When both double and triple bonds are present, the double bond gets the lower locant. Numbering from the right gives double bond at C1 and triple bond at C3. Correct name is but-1-en-3-yne, not 3-butene-1-yne. Incorrect. (2) Br - CH₂ - CH = CH₂ : The alkene gets priority in numbering. Numbering from right ( C^3 - C^2 = C^1 ) places double bond at position 1 and Br at position 3. Correct name is 3-bromoprop-1-ene. Correct. (3) H₃C - O - CH₂ - CH₃ : The smaller alkyl group (methyl) becomes the a