Match List - I with List - II.
List - I:
A. Control variable
B. Moderator variable
C. Extraneous variable
D. Dependent variable
List - II:
I. A kind of independent variable such as age, sex that cannot be manipulated.
II. A factor that could possibly influence the results and that is kept out of the study.
III. A factor that could affect the relationship between the independent variables but that is not included (or) controlled.
IV. The effect of the independent variable, also called the yield.
Choose the correct answer from the options given below:

Correct option is B

The correct answer is (b).
Introduction
Control variable is kept constant (II); moderator variable is an unmanipulated independent variable like age (I); extraneous variable is an unmeasured confounder (III); dependent variable is the outcome (IV). Thus A‑II, B‑I, C‑III, D‑IV.
Information Booster

• Control variable: held constant to prevent confounding.
• Moderator: affects strength/direction of relationship, not manipulated.
• Extraneous: uncontrolled factor that could bias results.
• Dependent: the measured effect.

• Option A mispairs control with I.
• Option C misplaces extraneous with IV.
• Option D misplaces control with III.