Match the following List-I with List-II and select the correct answer from the codes given below:
List I (Weather Instrument) - List II (Weather Phenomenon)
(a) Wet and Dry Bulb Thermometer - (i) Daily range of Temperature
(b) Six's Maximum and Minimum Thermometer - (ii) Wind direction
(c) Wind vane - (iii) Relative humidity
(d) Rain gauge - (iv) Amount of rain
Codes :

Question

Match the following List-I with List-II and select the correct answer from the codes given below: 
List I (Weather Instrument) - List II (Weather Phenomenon)
(a) Wet and Dry Bulb Thermometer - (i) Daily range of Temperature
(b) Six's Maximum and Minimum Thermometer - (ii) Wind direction
(c) Wind vane - (iii) Relative humidity
(d) Rain gauge - (iv) Amount of rain 
Codes :

Accepted Answer

Option 4 is the correct answer because it accurately matches the weather instruments in List I with the weather phenomena they measure in List II. Here's a detailed explanation:

*   **(a) Wet and Dry Bulb Thermometer - (iii) Relative humidity:** A wet and dry bulb thermometer, also known as a hygrometer, uses the difference in temperature between a dry bulb thermometer and a wet bulb thermometer to determine the relative humidity of the air. The evaporation from the wet bulb cools it, and the amount of cooling is related to the humidity. Higher humidity means less evaporation and a smaller temperature difference.

*   **(b) Six's Maximum and Minimum Thermometer - (i) Daily range of Temperature:** Six's thermometer is specifically designed to record the maximum and minimum temperatures reached over a period, typically a day. It uses a U-shaped glass tube with indices that are pushed by the expansion and contraction of a liquid (usually alcohol or mercury) to mark the highest and lowest temperatures. The difference between these readings gives the daily temperature range.

*   **(c) Wind vane - (ii) Wind direction:** A wind vane, also known as a weather vane, is a simple instrument used to indicate the direction of the wind. It typically consists of a rotating pointer that aligns itself with the wind.

*   **(d) Rain gauge - (iv) Amount of rain:** A rain gauge is an instrument used to measure the amount of liquid precipitation (rain, snow, hail, etc.) over a set period of time. It collects the precipitation in a container, and the depth of the collected water is measured.

Now, let's explain why the other options are incorrect:

*   **Option 1: (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv):** This is incorrect because a wet and dry bulb thermometer does not directly measure the daily range of temperature (that's Six's thermometer's job). Also, Six's thermometer doesn't measure relative humidity.

*   **Option 2: (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii):** This is incorrect because a wind vane does not measure the amount of rain, and a rain gauge does not measure wind direction.

*   **Option 3: (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv):** This is incorrect because Six's thermometer measures the daily range of temperature, not wind direction, and a wind vane measures wind direction, not the daily range of temperature.

Therefore, only Option 4 provides the correct pairings of weather instruments and the weather phenomena they measure.