B and C are the second and third letters of the English alphabet. They are both consonants and are used frequently in writing and speech. The letter B is often associated with the sound /b/, as in the word bat, while C can represent different sounds, such as /k/ in cat or /s/ in city. In terms of their position, B comes before C, making it the second letter, while C is the third. Both letters are essential in forming words and are commonly found in various languages that use the Latin script.