Select the correctly spelt English word from the following options.

Introduction / Context:
Spelling questions test a candidate's familiarity with common English words and their correct written forms. In exams, such questions often use words that sound familiar when spoken but are easy to misspell. Here, the task is to identify the correctly spelt word among several similar-looking but incorrect options.

Given Data / Assumptions:

• The options are: "transmitt," "aplauds," "mobility," "ceramix," and "mobilitty."
• Only one of these words is correctly spelt in standard English.
• The correct word should be recognisable and meaningful as a standard English vocabulary item.

Concept / Approach:
We need to check each option against standard spelling patterns. The word "mobility" is commonly used to refer to the ability to move or be moved freely and easily, as in "social mobility" or "mobility of joints." It is correctly spelt as M O B I L I T Y. The other options either add extra letters, change letters unnecessarily, or form non-standard variants that are not accepted spellings in English.

Step-by-Step Solution:

Step 1: Look at "transmitt." The standard verb is "transmit," and its forms include "transmits," "transmitted," and "transmitting," but not "transmitt" as a base form. Step 2: Examine "aplauds." The correct form is "applauds" with a double p. Missing one p makes the spelling incorrect. Step 3: Check "mobility." This exactly matches the standard spelling of the noun derived from "mobile." Step 4: Inspect "ceramix." The correct word is "ceramics" with an s, not "ceramix" with an x. Step 5: Evaluate "mobilitty." This has an extra t and is not a standard spelling.

Verification / Alternative check:
We can recall normal usage: "improved mobility after surgery," "high mobility of workers," or "mobile phones and their mobility." In all these contexts, dictionaries list the word as "mobility." None of the other options appear in standard dictionaries, nor are they acceptable variants. This confirms that "mobility" is the only correct choice.

Why Other Options Are Wrong:

Option A: "transmitt" adds an unnecessary extra t and does not correspond to any base form of the verb "transmit." Option B: "aplauds" is incorrect because it lacks the second p needed in "applauds." Option D: "ceramix" replaces the correct ending "ics" with "ix," creating a non-standard and incorrect spelling. Option E: "mobilitty" doubles the letter t incorrectly and does not match any correct English word.

Common Pitfalls:
Many learners rely heavily on pronunciation and assume that if a word sounds correct, any similar spelling is acceptable. However, English spelling often has fixed patterns, especially in common suffixes like "-ity," "-ics," or "-mit." Confusing single and double consonants is another typical issue. Building a habit of observing correct spellings when reading and making personal word lists can help reduce such errors.

Final Answer:
The only correctly spelt word is mobility.