Which of the following statement is true?Drying is a chemical changeDehydation  and drying are sameDrying is a physical changeDehydration and drying are different

The true statement among the ones provided is "Drying is a physical change".

Here's why:

1. Drying is a physical change: This is true because drying only removes water from the substance, it doesn't change the substance's chemical identity. For example, when clothes dry, they are still made of the same material, just without the water.

2. Drying is a chemical change: This is false because, as explained above, drying does not alter the chemical identity of a substance.

3. Dehydration and drying are the same: This is false. While both processes involve removing water, dehydration specifically refers to the loss of water from a living organism, which can be a serious health condition. Drying, on the other hand, is a broader term that can refer to the removal of water from anything, not just living organisms.

4. Dehydration and drying are different: This is true in the context that dehydration refers specifically to the loss of water from a living organism, while drying can refer to the removal of water from any substance. However, in the context of the question, the statement "Drying is a physical change" is the only one that is completely true without any qualifications.