Correct Option
Lathyrism is a neurological disorder primarily caused by the excessive and prolonged consumption of khesari dal (Lathyrus sativus). This legume contains a neurotoxic amino acid known as beta-N-oxalyl amino alanine (BOAA). Continuous intake of BOAA can lead to irreversible paralysis of the lower limbs, a condition particularly prevalent in malnourished populations heavily dependent on this pulse as a dietary staple.
Incorrect Options
Option 2 (mustard oil): Excessive consumption of mustard oil is not associated with lathyrism. While some varieties may contain erucic acid, it does not cause the specific neurotoxic effects leading to lathyrism.
Option 3 (polished rice): Overconsumption of polished rice is primarily linked to beriberi, a deficiency disease resulting from inadequate intake of thiamine (vitamin B1), not lathyrism.
Option 4 (mushrooms): While certain species of mushrooms can be toxic and lead to various health complications, they are not implicated in the causation of lathyrism.