Which signs might indicate a Vitamin B12 deficiency?

Vitamin B12 deficiency can manifest in various signs and symptoms due to its critical role in red blood cell formation and neurological function. The presence of pale eye membranes, or pallor, often indicates anemia, which can result from inadequate B12 levels. In terms of oral health, a swollen tongue, also known as glossitis, can occur as a result of B12 deficiency, alongside other symptoms such as tongue discoloration, soreness, and changes in texture.

Swollen tongue and redness or swelling in the mouth can both serve as indicators of vitamin B12 deficiency, as they are linked to the body's impaired production of red blood cells and possible impact on overall oral health. Therefore, pale eye membranes combined with any oral manifestation like a swollen tongue or redness in the mouth can significantly suggest Vitamin B12 deficiency.

In the context of the multiple-choice question, while "pale eye membranes" alone does indicate potential anemia, the right answer would ideally include signs like "swollen tongue" or "redness/swelling of mouth," which are more definitive indicators of B12 deficiency. Thus, recognizing combinations of these symptoms gives a clearer indication of potential deficiency.