Assume the statements are true.

Statements: All camels are yaks. Some yaks are llamas. No llama is a mule.

Conclusions:

I. Some yaks are not mules.

II. Some camels are not mules.

Explanation

1. 01

   The yaks that are llamas cannot be mules. So some yaks are not mules: I follows.

2. 02

   Camels are only known to be yaks; the llama overlap may lie outside the camels. Every camel could be a mule, so II is not definite.

3. 03

   Only I follows.