A person living in hilly areas suffered from swollen neck. Which deficiency disease is he suffering from? What is the probable cause of this disease?​

iodine deficiency disease

Explanation:

The soil of hilly region lacks iodine which results in the production of food lacking iodine. The deficiency of iodine results in swollen neck which is known as goitre. Thus, the probable cause of this disease is iodine deficiency.

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i believe the answer is snake.