A. Ball and socket
A.
B. Hinge
B.
C. Pivot
C.
D. Saddle
D.
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
A hinge joint allows for back and forth movement, similar to how a door hinge works. The knee joint primarily allows flexion and extension of the leg, which corresponds to bending and straightening the knee.