Question

Match List - I with List - II

List - I (Type of Fold)	Characteristic
A. Polyclinal folds	I. Folds developed in many steps
B. Fan folds	II. Folds with variable axial surfaces
C. Conjugate folds	III. Folds with axial surfaces dipping towards each other
D. Cross folds	IV. Folds in which both the limbs are overturned

• A. A-I, B-III, C-II, D-IV
• B. A-II, B-I, C-III, D-IV
• C. A-I, B-IV, C-II, D-III
• D. A-II, B-IV, C-III, D-I

Hint:

Fan folds commonly have overturned limbs, while cross folds develop through more than one folding phase.

Answer 1

The Correct Option is D

Concept:
Folds are classified according to geometry, axial surface, limb attitude and development history.

Step 1: Match Polyclinal folds.
Polyclinal folds are folds with variable axial surfaces. \[ A\rightarrow II \]

Step 2: Match Fan folds.
Fan folds are folds in which both limbs may be overturned, giving a fan-like geometry. \[ B\rightarrow IV \]

Step 3: Match Conjugate folds.
Conjugate folds are folds in which axial surfaces dip towards each other. \[ C\rightarrow III \]

Step 4: Match Cross folds.
Cross folds are produced by more than one phase or step of folding. \[ D\rightarrow I \] Therefore, the correct matching is: \[ A-II,\ B-IV,\ C-III,\ D-I \] \[ \therefore \text{Correct Answer is (D)} \]