Which type of bones are present in 20 pairs in the human body?

• A. Ribs
• B. Phalanges
• C. Vertebrae
• D. Carpals

Answer: (A)

Verified step by step guidance

1. Begin by understanding the anatomy of the human skeletal system, which consists of various types of bones categorized by their location and function.
2. Identify the types of bones listed in the problem: ribs, phalanges, vertebrae, and carpals. Each type has a specific count and arrangement in the human body.
3. Ribs are part of the thoracic cage and are present in pairs. Humans typically have 12 pairs of ribs, not 20.
4. Phalanges are the bones in the fingers and toes. Each hand and foot has 14 phalanges, but they are not organized in pairs.
5. Vertebrae are the bones forming the vertebral column. There are 33 vertebrae in total, but they are not paired. Carpals are the wrist bones, with 8 in each wrist, also not paired. Therefore, none of these options are present in 20 pairs.