Institution: Bangladesh Bank Exam: Officer (Cash) -Sonali Bank | BD Development | BD Krishi Bank - 12.10.2018 ||
Topic: International General Knowledge, Subject: International GK (আন্তজার্তিক বিষয়াবলী)

Best Answer Explained in Below-:

The correct answer to the question is C) Relative humidity. Relative humidity is a measure of the current amount of water vapor in the air compared to the maximum amount of water vapor the air can hold at a given temperature, expressed as a percentage. This measurement is crucial for understanding how humid the air feels and its effects on weather and comfort levels.

In contrast, absolute humidity (A) refers to the actual amount of water vapor in a given volume of air, usually expressed in grams per cubic meter, without considering temperature. Specific humidity (B) measures the mass of water vapor per unit mass of air, including the water vapor itself, and is expressed as grams of water vapor per kilogram of air.

While all three terms relate to moisture in the air, only relative humidity specifically addresses the comparison of current moisture levels to the potential saturation level of the air, making it the correct choice for the question posed. Understanding relative humidity helps predict weather patterns and informs various fields like meteorology, agriculture, and HVAC systems.