Which sequence represents the best synthesis of 4-isopropylbenzonitrile ?

Which sequence represents the best synthesis of hexanal ?

Which is the best synthesis of

Which sequence of steps describes the best synthesis of compound

Which sequence of steps descirbes the best synthesis of 2-phenylpropene ?

Which sequence of steps describes the best synthesis of 2-phenylpropene ?

Which is best synthesis of

Which sequence represents the best synthesis of hexanal ? CH_(3)CH_(2)CH_(2)underset("Hexanal")(CH_(2))CH_(2)CH=O