Beriberi is caused by the deficiency of vitamin: MCQ with Answer and Explanation

Explanation:
Vitamin K is a cofactor for γ-glutamyl carboxylase, which modifies glutamate residues in clotting factors, enabling calcium binding and coagulation.

Explanation:
The liver is the body's largest internal organ, performing metabolism, detoxification, bile production, and protein synthesis. The gall bladder stores bile.

Explanation:
Thyroxine is an animal hormone secreted by the thyroid gland, regulating metabolism. Auxin, gibberellin, cytokinin, abscisic acid, and ethylene are plant hormones (phytohormones). Plant hormones control growth, development, and responses to environment. Thyroxine contains iodine and affects basal metabolic rate. Thus, thyroxine is unrelated to plant physiology.