Vitamin B12 is the distractor in this question because it also causes a broad-based, ataxic gait and decrease in vibration. But - Vitamin B12 will not have symptoms like Hemolytic Anemia (decreased hemoglobin, increased LDH). Vitamin E = answer, see below for explanation.
Vitamin E deficiency causes hemolytic anemia, acanthocytosis, muscle weakness, posterior column and spinocerebellar tract demyelination.
WTF is "weakness of plantar dorsiflexion" ????? it's like saying "extension flexion"
This is not the only obvious technical mistake in the new NBMEs ...