Concept:The question asks us to find the incorrectly spelt word among the four given options.
Explanation:Option A, "Allopathy", is correctly spelt.
Option B, "Homoepathy", is wrongly spelt because the correct spelling is "Homeopathy".
Option C, "Naturopathy", is correctly spelt.
Option D, "Telepathy", is correctly spelt.
Hence, the word with the spelling mistake is "Homoepathy".
Answer:Option B, "Homoepathy".