The words in Group A share a common property that only one word in Group B satisfies. Which one is it?

Group A:
Chains
Countess
Stained
Schooled
Purring
Corny

Group B:
Reaction
Penned
Spoiled
Stints
Putting
Hurry

Jordan, Justin and Jeff are brothers whose ages are 29, 30 and 31 (in any order). Your job is to determine the brothers' ages from the clues below. There's one catch though....only ONE clue is true. The rest are false. Good luck!

1. Justin is 30
2. Jordan is the youngest
3. Jordan is 31
4. Justin is one year older and one year younger than his brothers.
5. Justin is not the youngest.
6. Jordan is not two years ...

Which one of these sentences does not belong?

A) Diamonds often need keen, elegant yaks.

B) Teacups contain tea and sometimes grapes.

C) Roses are big, beautiful insect terraces.

D) Rocks are constantly coming only on November.

What popular Christmas carol nullifies itself by the singing of its first line?