Choose the correct answer from the options given below:

1. (A) – (I), (B) – (II), (C) – (III), (D) – (IV)
2. (A) – (I), (B) – (III), (C) – (II), (D) – (IV)
3. (A) – (III), (B) – (IV), (C) – (I), (D) – (II)
4. (A) – (III), (B) – (IV), (C) – (II), (D) – (I)

   Human karyotype analysis extends to anatomical bone identification through standard pairings of body regions and their primary bones.

   Correct Answer

   (A) – (III), (B) – (IV), (C) – (II), (D) – (I)

   Label	Body Part	Correct Bone	Anatomical Role
   A	Shoulder	III. Humerus	Upper arm bone forming shoulder joint ​
   B	Thigh	IV. Femur	Longest bone between hip and knee [prior anatomy]
   C	Wrist	II. Carpals	8 short bones enabling wrist flexibility ​
   D	Ankle	I. Tarsals	7 bones (talus, calcaneus etc.) forming ankle platform

   Each Correct Match Explained

   A. Shoulder → III. Humerus

   The humerus is the long bone of the upper arm, articulating with the scapula at the shoulder (glenohumeral) joint.​

   ✅ Proximal humerus head forms shoulder structure.

   B. Thigh → IV. Femur

   Femur (thigh bone) extends from hip acetabulum to knee, bearing body weight.[prior anatomy]

   ✅ Primary thigh bone.

   C. Wrist → II. Carpals

   Carpals are 8 small bones (scaphoid, lunate etc.) forming the wrist’s flexible carpus between radius/ulna and metacarpals.​

   ✅ Defines wrist joint.

   D. Ankle → I. Tarsals

   Tarsals (7 bones: talus superiorly connects tibia/fibula to foot; calcaneus forms heel) create ankle’s weight-bearing foundation.

   ✅ Ankle = tarsal bones.

   All Options Analysis

   (A)-(I), (B)-(II), (C)-(III), (D)-(IV)

   Shoulder ≠ tarsals (foot); wrist ≠ humerus (arm); ankle ≠ femur (thigh).​

   ❌ Wrong: Foot bones in upper body.

   (A)-(I), (B)-(III), (C)-(II), (D)-(IV)

   Shoulder ≠ tarsals; thigh ≠ humerus (upper arm).

   ❌ Wrong: Mixes leg/foot with arm.

   (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

   All anatomically precise: humerus-shoulder, femur-thigh, carpals-wrist, tarsals-ankle.

   ✅ Correct option.

   (A)-(III), (B)-(IV), (C)-(I), (D)-(II)

   Wrist ≠ tarsals (foot); ankle ≠ carpals (hand).

   ❌ Wrong: Confuses hand/foot bones.

   Exam Mnemonic: Shoulder-Humerus, Thigh-Femur, Wrist-Carpals, Ankle-Tarsals (SATFAT).