Question

Which of the following statements are incorrect regarding the given figure?

(i) The parts labelled P and Q show ball and socket joint and hinge joint respectively.
(ii) The part labelled R is radius bone.
(iii) The parts labelled T and U are called metacarpals and carpals respectively.
(iv) The part labelled S is ulna bone.

• A. (iii) only
• B. (ii) and (iii) only
• C. (i) only
• D. (ii) and (iv) only

Answer 1

The correct option is A

(iii) only

• P directs towards the shoulder. And we know that ball and socket joint is present here. Similarly, Q directs towards the elbow. And a hinge joint is present here. Therefore, statement (i) is correct.
• The two forearm bones are radius which is labelled as ‘R’ and ulna as ‘S’. Therefore, statements (ii) and (iv) are correct.
• The wrist bones are carpals labelled as ‘T’, palm bones i.e., metacarpals as ‘U’. But this is labelled wrong. Hence statement (iii) is incorrect.