Institution: Bangladesh Shilpa Bank Ltd Exam: Bangladesh Shilpa Bank Ltd - Officer - 2004
Topic: Spelling, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The correct spelling of the word is "ceiling," which refers to the upper interior surface of a room. This word is derived from the Old French word "ceiling," which means "to cover."

When examining the incorrect options, we see various misspellings that do not conform to standard English spelling rules. Option A, "Ceilling," incorrectly doubles the "i" in the middle, which is unnecessary and diverges from the original word. Option B, "Cealling," incorrectly inserts a second "l" and modifies the vowel combination. Option C, "Cealing," also deviates by substituting the "i" with an "a," deviating from its historical spelling.

English words often rely on specific letter combinations and patterns to maintain their correct form. "Ceiling" correctly follows these patterns, using "ei" in the second syllable. Therefore, option D, "Ceiling," stands out as correct both phonetically and etymologically, aligning with standard English spelling conventions. Understanding these rules can significantly aid in mastering correct spellings in English.