Correctly spelled:

**The reasoning** The correct spelling is **necessary** (B). This word follows a specific pattern you need to memorize: **one C, two S's**. Think of it as "ne-**c**-e-**ss**-ary." The word comes from Latin *necessarius*, but in English, we simplified it to just one 'c' while keeping the double 's'. Many students struggle with this because they're unsure where to double the consonants. **Memory trick:** Remember "**one collar, two sleeves**" — one C, two S's. Or think: "It's **neCeSSary** to remember CSS" (like the tech term). Say it slowly: neh-SESS-uh-ree. **Why the wrong options tempt you** - **A (Necesary):** You might think "keep it simple, no doubles" — but this drops the crucial second 's'. - **C (Neccessary):** Sounds logical to double the 'c', but English kept only the double 's' from Latin. - **D (Necesarry):** You're confusing it with words like "carry" or "marry" that end in 'rry'. **Quick takeaway** **Necessary = 1 C + 2 S's.** Think "one Collar, two Sleeves" and you'll nail it every time on JAMB, WAEC, or any exam!