The alkene $C_6H_{10}$ producing $OHC(CH_2)_4CHO$ on ozonolysis is

Question

$\begin{array}{1 1}(a)\;\text{Hexene-1}&(b)\;\text{Hexene-3}\\(c)\;\text{Cyclohexene-1}&(d)\;\text{1-Methyl cyclohexene-1}\end{array}$