What are the possible signs of biotin deficiency?

The signs of biotin deficiency primarily include dermal symptoms and neuromuscular issues. Among the choices provided, psoriasis, scaliness, and muscle pain accurately reflect the manifestations one might expect with a lack of biotin. Biotin plays a crucial role in fatty acid synthesis, amino acid metabolism, and glucose production, which are all essential for maintaining healthy skin and muscle function. Individuals with biotin deficiency may exhibit skin conditions such as dermatitis, which can present as psoriasis or scaliness, and may also experience muscle pain due to diminished energy metabolism.

The other signs mentioned, such as swollen or bleeding gums and bruising, are not directly associated with biotin deficiency but may be indicative of other nutritional deficiencies or health issues. The oral health issues suggested in the first choice and the dental manifestations in the second choice are not typical of biotin deficiency. Rather, they may be more relevant to deficiencies in other nutrients like vitamin C, which is essential for gum health, or certain minerals that influence blood clotting and skin integrity.

Overall, while the first two options mention symptoms, they do not specifically correlate with the established signs of biotin deficiency, making the third choice the most accurate representation of the condition.