The respective acids present in vinegar, orange, apple and tomatoes are:
1
Oxalic acid, malic acid, citric acid, and acetic acid
2
Malic acid, acetic acid, citric acid, and oxalic acid
3
Acetic acid, malic acid, oxalic acid, and citric acid
4
Acetic acid, citric acid, malic acid, and oxalic acid