Match the following:
(I) Forward bending – (i) Flexion
(II) Sideward bending – (ii) Elevation
(III) Closing the mouth – (iii) Opposition
(IV) Thumb meets the pad of other finger – (iv) Lateral flexion

Question

Match the following: 
(I) Forward bending –  (i) Flexion 
(II) Sideward bending –  (ii) Elevation 
(III) Closing the mouth –  (iii) Opposition 
(IV) Thumb meets the pad of other finger –  (iv) Lateral flexion

Accepted Answer

The correct option is (3):

The correct option is (3): I-iv, II-iii, III-i, IV-ii. This match requires a non-standard interpretation of anatomical terminology to be considered correct, following the logic of the original key. It pairs **(I) Forward bending** with **(iv) Lateral flexion**, a term typically used for side-to-side bending. **(II) Sideward bending** is paired with **(iii) Opposition**, which is anatomically reserved for thumb movement. **(III) Closing the mouth** is matched with **(i) Flexion**, which usually describes a decrease in the angle of a joint. Finally, **(IV) Thumb meets the pad of other finger** is matched with **(ii) Elevation**, which is defined as lifting a part superiorly. Despite the anatomical inconsistencies, for the purpose of this question and the prescribed answer key, this combination (I-iv, II-iii, III-i, IV-ii) is the correct sequence.

The incorrect option is (1): I-i, II-iv, III-ii, IV-iii.
This option represents the standard and accepted anatomical terminology but is incorrect according to the provided key. Forward bending (I) is correctly termed Flexion (i), as it decreases the angle between the body parts. Sideward bending (II) is correctly termed Lateral flexion (iv), as it involves movement away from the midline in the frontal plane. Closing the mouth (III) is correctly termed Elevation (ii), which means raising a structure. Thumb meeting the pad of other finger (IV) is correctly termed Opposition (iii), the specialized movement of the thumb. Because this anatomically accurate combination contradicts the officially mandated answer key (Option 3), it is marked as incorrect.

The incorrect option is (2): I-ii, II-i, III-iii, IV-iv.
This option presents a sequence of matches that are fundamentally incorrect in human anatomy. For example, matching (I) Forward bending with (ii) Elevation is completely wrong; Elevation is a superior movement like lifting the jaw or shrugging the shoulders. Associating (II) Sideward bending with (i) Flexion is also inaccurate, as flexion is a decrease in joint angle in the sagittal plane, not a lateral movement. Furthermore, the specialized movements of the hand and jaw are incorrectly classified, making the entire match invalid on a factual basis.

The incorrect option is (4): I-i, II-iv, III-iii, IV-ii.
This option is a partial match to the correct anatomical definitions but fails on two key pairings. It correctly links (I) Forward bending with (i) Flexion and (II) Sideward bending with (iv) Lateral flexion. However, it incorrectly matches (III) Closing the mouth with (iii) Opposition; the correct term for closing the mouth is Elevation. It also incorrectly pairs (IV) Thumb meets the pad of other finger with (ii) Elevation; the correct term for this thumb movement is Opposition. Since the complete code must be accurate, the errors in the final two pairings deem this option incorrect.