Vitamin B deficiency can lead to various health problems, and the correct answer to this question is option 3, Beri-Beri. Beri-Beri is a condition that occurs due to a deficiency of thiamine (Vitamin B1). It primarily affects the nervous and cardiovascular systems, causing symptoms such as muscle weakness, fatigue, fluid retention, and even heart problems.

Option 1, Scurvy, is caused by a deficiency of Vitamin C, not Vitamin B. It leads to symptoms like bleeding gums and skin problems. Option 2, Dermatitis, is a skin condition that can have various causes, including allergies, irritants, and certain medical conditions, but it is not directly linked to Vitamin B deficiency. Option 4, Phynoderma, is not a recognized medical condition, and there is no scientific evidence to suggest a direct link between Vitamin B deficiency and this term.