Question

Match List-I with List-II (choose the correct answer from the options given below):

List-I (Instrument)	List-II (Parameter)
(A) Wind vane	(I) Photosynthetically active radiation
(B) Quantum sensor	(II) Wind speed
(C) Anemometer	(III) Atmospheric pressure
(D) Barometer	(IV) Wind direction

Choose the correct answer from the options given below:

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

Hint:

Ask what each device physically senses: direction, light, speed, or pressure.

Answer 1

The Correct Option is A

This question tests basic knowledge of common weather and plant-science instruments used in agricultural meteorology.

1. Wind vane: a light arrow-shaped device that swings freely and points into the wind, so it tells us the wind direction, item (IV).
2. Quantum sensor: a small photocell tuned to the light band that plants use for photosynthesis, so it reads photosynthetically active radiation, item (I).
3. Anemometer: usually built with three spinning cups, its rotation speed is converted into wind speed, item (II).
4. Barometer: a sealed instrument that senses the push of the atmosphere on it, giving atmospheric pressure, item (III).

Putting these four pairs together gives (A)-(IV), (B)-(I), (C)-(II), (D)-(III), which is exactly option 1.

Let's summarize:

• Wind vane gives direction, anemometer gives speed, these two are often confused with each other.
• Quantum sensor gives PAR, barometer gives pressure, these two are unrelated to wind at all.

So the matching in option 1 is correct.