The Correct Answer is :- 3) Vitamin - B1 Explanation & Key Takeaways: • Vitamin B1, also known as thiamine, plays a crucial role in cellular energy production. It is involved in the metabolism of glucose, enabling cells to use this fuel to create energy. • The heart, brain, and the nervous system are particularly affected by the deficiency of vitamin B1, as they require a lot of energy to function properly. • There are typically two types of beriberi - dry and wet. Dry beriberi primarily affects the nervous system causing nerve degeneration and muscle weakening. Wet beriberi, on the other hand, affects the cardiovascular system leading to symptoms like an enlarged heart, shortness of breath, and leg swelling. • The condition is particularly common in regions where the diet consists largely of polished white rice, which is low in thiamine since the nutrient is concentrated primarily in the outer layers that get removed during the refining process. • It is also common among alcoholics, as heavy drinking can prevent the body from properly absorbing and utilizing thiamine. • Beriberi can be effectively treated through thiamine supplementation and dietary changes. • If left untreated, beriberi can lead to severe complications, such as heart failure and death. Therefore, prevention and early detection are essential.