The correct answer is C. Kgs.
Kilograms (kg) are the most common unit of measurement for stock items like grain, pulse, sugar, oil, ghee etc. This is because they are a convenient and accurate way to measure the weight of these items.
Lts (liters) are another unit of measurement that can be used for stock items. However, they are not as commonly used as kgs because they are not as accurate. This is because the density of different items can vary, so the volume of an item may not be a reliable indicator of its weight.
Nos (numbers) are not a unit of measurement. They are simply a way of counting the number of items in a stock.
Box is a unit of measurement that can be used for some stock items, such as boxes of cereal or boxes of detergent. However, it is not a very accurate unit of measurement, as the weight of items in a box can vary.
Therefore, the correct answer is C. Kgs.