Answer the following question given this paragraph: 

Citric acid is a large carboxylic acid with three ionizable hydrogen atoms. It is found in citrus fruits and gives them their sour or tart flavor.


Q: What large carboxylic acid with three ionizable hydrogen atoms gives some fruits a sour or tart flavor?

 Choices:

- ammonia acid

- beryllium acid

- hydrochloric acid

- citric acid

A:
citric acid
