1. Acids and bases

Select the correct answer:
 
Sanjay tests the pH of different fruit juices:

Lemon juice: pH \(2.5\)
Orange juice: pH \(3.5\)
Watermelon juice: pH \(5.0\)

He also finds that these contain acids such as citric acid and malic acid. The acids present in these fruits are classified as:
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