Out of ‘X’ pairs of ribs in humans, generally ‘Y’ pairs are floating ribs. Select the option that correctly represents values of ‘X’ and ‘Y’.

Out of the 12 pairs of ribs, the last two (11^th and 12^th) pairs of ribs are not connected ventrally and are therefore, called floating ribs. True ribs (1^st seven pairs) are ventrally connected to the sternum. The vertebrochondral ribs (8^th, 9^th and 10^th pairs) do not articulate directly with the sternum but join the seventh rib with the help of hyaline cartilage. The first seven pairs of ribs are ventrally connected to the sternum directly and are called true ribs.