Step 1: Understanding the Question:
The task is to identify the correct spelling of the word from the four options provided.
Step 2: Key Formula or Approach:
This question tests spelling knowledge. The approach is to carefully examine each option and compare it against the known correct spelling of the word.
Step 3: Detailed Explanation:
Let's analyze each spelling:
(A) Vacum: This is incorrect. It is missing the second 'u'.
(B) Vaccum: This is incorrect. It incorrectly uses a double 'c' instead of a double 'u'.
(C) Vacuum: This is the correct spelling. The word is unique for having a double 'u'.
(D) Vacume: This is incorrect. The ending is wrong.
Step 4: Final Answer:
The only correctly spelled word among the options is "Vacuum". Thus, option (C) is the correct answer.