See also: Diagonal attachment - knight's move angle play sabaki technique (your position is similar except that is one line closer and White is "one move ahead")

Unkx80 wrote:

corner  

The first intuition should be a or b. a may provoke a fight at c. b presses the corner into a low position.

After a black has shape problems in the corner. b seems too easy on black, although white's idea might be to go back and attack the pincer stone.