Which of the following is not true for covalent catalysis?

• A. A number of coenzymes for covalent adducts generating new electrophilic groups which can function as electron sink
• B. These adduct forming coenzymes leads to increase in rate acceleration
• C. About 100 enzymes show covalent intermediates during catalysis
• D. Hydrolysis of acetyl imidazole is an example of this type of catalysis