must be answered by - and certainly not or . One suffers from shortage of liberties, and the other lets Black kill at .
looks like making two eyes, but due to the descent at , Black can play . Now White can only live by a ko at .
Note that at a is wrong - see below.
If White throws in with , takes one of the kos. Now if White plays at a or b, Black fills with , holding White to one eye.
lavalyn, Dansc, Bill Spight, unkx80.