Four words are given. Choose the correctly spelt word from the options.

Introduction / Context:
This spelling question tests your familiarity with the correct spelling of common English nouns. The word hidden among the options is "stagnation", which refers to a state of not moving, growing, or developing, often used in economic or social contexts. Correct spelling is essential in exams because it reflects both your vocabulary and your ability to notice patterns in English word formation.

Given Data / Assumptions:
• Target word idea: stagnation, from the verb stagnate. • Options include several similar looking versions: Stagnetion, Stagnasion, Stagnation, Stegnation. • Only one option is spelt correctly. • The base verb is "stagnate" and the noun form is created by adding "ion".

Concept / Approach:
English nouns ending in "tion" often come from verbs ending in "te" or "t". For example, create becomes creation, narrate becomes narration, and stagnate becomes stagnation. The pattern is to keep the consonant and replace the "e" with "ion". Knowing the correct verb form helps you identify the correct noun form. You must also pay attention to the order of consonants "gn" in "stagnate", which must be preserved in the noun.

Step-by-Step Solution:
1. Recall the verb "to stagnate", which means to stop developing or flowing. 2. Apply the common rule of forming a noun by changing "stagnate" to "stagnation". 3. Check each provided spelling carefully against this correct pattern. 4. Option A, "Stagnetion", includes the extra letter "e" in the wrong place and breaks the "tion" ending pattern. 5. Option B, "Stagnasion", uses "sion" instead of "tion", which is not correct for this root word. 6. Option D, "Stegnation", misplaces the consonants and changes "stag" to "steg". 7. Option C, "Stagnation", exactly matches the known noun formed from "stagnate".

Verification / Alternative check:
You can verify by thinking of common collocations such as "economic stagnation" or "stagnation in growth". These phrases are often encountered in newspapers and textbooks, and they consistently use the spelling "stagnation". A quick mental image of such headlines or sentences helps confirm that option C is the correct one. Looking up the base verb "stagnate" in your memory and applying the regular spelling rule also supports the same answer.

Why Other Options Are Wrong:
Option A, "Stagnetion", introduces an extra "e" before "tion" and does not follow the proper formation from "stagnate". Option B, "Stagnasion", uses the ending "sion", which is used in words like "confusion" or "decision" but not in "stagnation". Option D, "Stegnation", replaces "a" with "e" in the root, changing the base form entirely. These spellings either distort the root word or use an incorrect suffix and therefore are not acceptable forms in standard English.

Common Pitfalls:
Students sometimes rely too heavily on pronunciation when spelling, which can lead to endings like "sion" instead of "tion". Others may misplace vowels in the root or assume that any choice that looks complex must be correct. A better habit is to connect spelling with word families: if you remember the verb "stagnate", it becomes easier to spell the derived noun "stagnation". Regular reading of quality English texts also strengthens your visual memory of correct spellings.

Final Answer:
The correctly spelt word among the options is Stagnation.