Napoleon named himself all of the following, except

a.

First Consul.

c.

King.

b.

Consul for Life.

d.

Emperor.

Napoleon was King of Italy and Emperor of the French - so those two were some titles he used.

Before this he was also the First Consul.

So this leaves b. Consul for life as the false option (and he wasn't a consul for life, he became an emperor later).