| A) Retinol | B) Riboflavin | 
| C) Thiamine | D) Niacin | 
Explanation:
Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, retinoic acid, and several provitamin A carotenoids.
IUPAC Name :: (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraen-1-ol
Vitamin Name - Chemical Name
Vitamin A - Retinol
Vitamin B1 - Thiamine
Vitamin B2 - Riboflavin
Vitamin B3 - Niacin
Vitamin B5 - Pantothenic acid
Vitamin B6 - Pyridoxin
Vitamin B7 - Biotin
Vitamin B9 - Folic acid
Vitamin B12 - Cyanocobalamin
Vitamin C - Ascorbic acid
Vitamin D - Calciferol
Vitamin E - Tocoferol
Vitamin K - Phylloquinone and Menaquinones
 
                             Aptitude and Reasoning
                                                                        Aptitude and Reasoning General Knowledge
                                                                        General Knowledge Puzzles
                                                                        Puzzles Interviews
                                                                        Interviews Technical
                                                                        Technical Certifications
                                                                        Certifications Exams
 Exams Job
                                                                    Roles
 Job
                                                                    Roles True or False
 True or False Exams
 Exams