What are called false ribs?

• A
  The $1^{st}$ to $7^{th}$ pairs of ribs
• B
  The $8^{th}$,$9^{th}$ and $10^{th}$ pairs of ribs
• C
  The $11^{th}$ and $12^{th}$ pairs of ribs
• D
  The $1^{st}$ and $2^{nd}$ pairs of ribs