Question

Sigmoid notch is present in

• A. Radius
• B. Ulna
• C. Humerus
• D. Femur

Answer 1

The correct option is B

Ulna

The correct option is Option B.

The explanation for the correct option :

1. The sigmoid notch is a cup-like depression generated by the olecranon and the coronoid process within the proximal ulna.
2. There is an ulnar notch on the radius.
3. The distal radioulnar joint is generated when the ulna's lateral convex articular surface collides with the distal radius's ulnar notch.
4. Ulna features a sigmoid notch.
5. A radial notch refers to the radial notch on the head of the ulna that produces the distal radioulnar joint.
6. The humerus has a trochlear notch, sometimes known as a semilunar notch.
7. An intercondylar notch is seen on the femur.

The explanation for the incorrect options :

Option A:

1. Radius is referred to the bone located on the thumb side of the human forearm which is associated with ulna to ends in humans.
2. It helps hand movement and rotation.

Option C:

The humerus is a long bone in the upper arm that connects the elbow and shoulder to other bones in the arm.

Option D

1. The femur is the only bone in the human thigh.
2. It is the longest and strongest bone in the human body, running from the hip to the knee.

Final Answer :
A sigmoid notch is present in Ulna.