4-4 point low approach three-space low pincer

Three-space low pincer  

This is a traditional pincer that is still played.
igoalone: KJD (2011) notes that this is "Outdated" Anybody know why?

White's common replies  

White's normal answers are:

• a
• b
• c
• tenuki?

Alex Weldon: I've been searching unsuccessfully for the continuation if White plays at c. Someone help me out?

The jump out at j was played in old Chinese games, but isn't a major variation in comtemporary go.

Charles Matthews