Identify the correct statement about blood groups: MCQ with Answer and Explanation

Explanation:
Albert Sabin developed the attenuated oral polio vaccine (OPV), which is easier to administer and provides intestinal immunity. Salk developed the inactivated vaccine (IPV).

Explanation:
Vitamin A is essential for the synthesis of rhodopsin, a visual pigment; its deficiency leads to night blindness, the inability to see in low light conditions. Vitamin B1 (thiamine) is crucial for carbohydrate metabolism; its deficiency causes beriberi, characterized by nerve and heart dysfunction, and muscle weakness. Vitamin C (ascorbic acid) is essential for collagen synthesis; its deficiency causes scurvy, characterized by bleeding gums, loose teeth, and poor wound healing. All three statements are correct.

Explanation:
Monocots typically have trimerous flowers (floral parts in multiples of three), parallel venation, fibrous roots, and one cotyledon. Dicots have reticulate venation, taproots, tetramerous/pentamerous flowers, and two cotyledons. Examples: grasses, lilies, orchids. These features are key in plant classification.