Vitamin B12 Drops Market, By Type (Cyanocobalamin, Methylcobalamin, Hydroxocobalamin, Adenosylcobalamin), By Indication (Vitamin B12 Deficiency, Megaloblastic Anemia, Gastrointestinal Disorders, Gastrointestinal Issues, Others), By Age Group (Pediatric and Adults), By Distribution Channel (Pharmacies & Drug Stores, Supermarkets & Hypermarkets, Online Channels, Others), By Geography (North America, Latin America, Asia Pacific, Europe, Middle East, and Africa)