Which of the following selected chain is correct :
(1) CH₃- CH - CH₂ - CH₂ - CH₃
CH₂ - OH
(2)CH₂ = CH - CH - CH = CH₂
COOH
(3) CH₂ = CH - CH₂ -CH-CH₃
CH₂
CH₃
(4) CH₃ - CH - CH - CH₂ - CH₃
OH CH = CH₂