Four similar-looking words are given. Choose the correctly spelt English word "commemorate", meaning to honour the memory of an event or person.

Introduction / Context:
"Commemorate" is a commonly tested spelling in competitive exams because of its repeated consonants and its use in formal contexts like national days, anniversaries, and tributes. It means to celebrate or honour the memory of a person, event, or achievement. Being able to spell it correctly helps you write accurate essays, reports, and formal letters.

Given Data / Assumptions:
- You must select the correct spelling of "commemorate".
- The options change the order and number of consonants and vowels slightly to confuse you.
- Only one option corresponds to the standard, dictionary-recognised form.

Concept / Approach:
The correct spelling is "commemorate". The key pattern is "com-mem-o-rate" with double m only once and no double r. Wrong forms typically add or remove m's or r's, or alter vowel positions. Remembering a few typical uses like "to commemorate Independence Day" will help you lock in the accurate spelling.

Step-by-Step Solution:
Step 1: Break the word into parts: "com" + "mem" + "orate".
Step 2: Check option b, "Commemorate". It follows the expected pattern: c-o-m-m-e-m-o-r-a-t-e.
Step 3: Option a, "Commemmorate", has three m's in a row, which is not standard.
Step 4: Options c and d, "Comemmorate" and "Comemorate", misplace or omit m's, and option e adds extra consonants again.

Verification / Alternative check:
Think of example sentences: "We commemorate the freedom fighters every year" or "The plaque was placed to commemorate the event." In printed materials, on memorials, and in news articles, the word is always spelt "commemorate". No serious publication uses any of the variant spellings seen in the options, which confirms that only "Commemorate" is correct.

Why Other Options Are Wrong:
- "Commemmorate": includes an unnecessary extra m, creating an awkward cluster "mmm".

- "Comemmorate": changes the pattern of vowels and consonants in the middle of the word.
- "Comemorate": drops an m, which changes the familiar "mem" part of the word.
- "Commermorate": introduces extra r and m, making the spelling incorrect and unfamiliar.

Common Pitfalls:
Because English has many words with double consonants, students often guess incorrectly where to double letters. A good method is to relate "commemorate" to "memory": both share the "mem" root, helping you remember where the double m should be placed. Repeated exposure through reading and practice tests will make the correct spelling look "right" to your eyes over time.

Final Answer:
The correctly spelt word is "Commemorate".