20.2 Retro-synthesis (HL)

Understandings:
Retro-synthesis of organic compounds.
Applications and skills:
Deduction of multi-step synthetic routes given starting reagents and the product(s).
Guidance:
Conversions with more than four stages will not be assessed in synthetic routes.
Reaction types can cover any of the reactions covered in topic 10 and sub-topic 20.1.

[isaacjfung]

Could you have also made this 3 stages; by going from an alcohol to an alkene directly?