The number of pairs of false ribs isA2B3C4D7

In humans there are normally 12 pairs of ribs. The first seven pairs are attached directly to the sternum by costal cartilages and are called true ribs. The 8th, 9th and 10th pairs are called as false ribs which do not join the sternum directly but are connected to the 7th rib by cartilage. The 11th and 12th pairs are called floating ribs. So, there are 3 pairs of false ribs present. So, the correct answer is '3'.