Question

Match List-I with List-II

List-I Parameters	List-II Unit
(A). Relative humidity	(I). Degree centigrade
(B). Temperature	(II). Candela
(C). Cloud cover	(III). Per cent
(D). Luminous intensity	(IV). Oktas

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

Hint:

- Oktas is a highly specific meteorological unit used solely for estimating Cloud cover (scaled from 0 to 8).
- Candela is the SI base unit of Luminous intensity.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Meteorological and physical parameters must be quantified using standardized units of measurement to ensure accurate scientific observations and climate modeling.

Step 2: Detailed Explanation:
Let us match each parameter in List-I with its correct unit in List-II:
- (A). Relative humidity:
Relative humidity is the ratio of the actual water vapor pressure of the air to the saturated water vapor pressure at the same temperature, expressed as a Per cent (%).
Thus, (A) matches with (III).
- (B). Temperature:
The standard meteorological unit used to measure the thermal state of the atmosphere is the Degree centigrade ($^{\circ}\text{C}$).
Thus, (B) matches with (I).
- (C). Cloud cover:
Cloud cover (or cloudiness) is measured in Oktas, where one okta represents one-eighth of the sky dome covered by clouds (e.g., 0 oktas represents a completely clear sky, and 8 oktas represents a completely overcast sky).
Thus, (C) matches with (IV).
- (D). Luminous intensity:
Luminous intensity is an SI base unit that measures the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, quantified in Candela (cd).
Thus, (D) matches with (II).
Combining these matches, we get: (A)-(III), (B)-(I), (C)-(IV), (D)-(II).

Step 3: Final Answer:
The correct matching sequence corresponds to Option B.