Explain Duo-Trio test and ranking test for sensory evaluation of food.

The Duo-Trio test and the Ranking test are both sensory evaluation techniques used in food science to assess the sensory properties, such as taste, texture, and aroma, of food products. These tests are designed to help determine the differences between food samples or rank them according to specific sensory attributes.

### Duo-Trio Test

The Duo-Trio test is a sensory evaluation method that involves presenting three samples to a panelist. Two of these samples are identical, and the third is different. The panelist is required to identify the sample that differs from the other two. This test is typically used to evaluate differences in attributes such as taste, texture, or appearance.

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