English Grammar – Spot the error (choose the erroneous segment or ‘‘No error’’). Sentence: As the ticket was firm affixed on the envelope, he could not remove it.

Introduction / Context:
This sentence tests adverb–adjective choice and collocation with the verb “affix”. When describing how something is affixed, an adverb is required (“firmly”), not the adjective “firm”. In addition, the common collocation is “affixed to” rather than “affixed on”.

Given Data / Assumptions:

• Linking structure: “was … affixed”.
• Intended meaning: the ticket was attached securely.
• Current phrase: “firm affixed”.

Concept / Approach:
Modify verbs with adverbs. Therefore, use “firmly affixed”. Also, standard preposition is “to”: “affixed to the envelope”. The key tested error is the misuse of “firm” (adjective) where “firmly” (adverb) is needed.

Step-by-Step Solution:

Verification / Alternative check:
Try another adverb: “securely affixed to the envelope” reads naturally. The ungrammatical “firm affixed” jars the ear.

Why Other Options Are Wrong/Acceptable:

• A and D are grammatically sound.
• C would be even better as “to the envelope”, but the primary grammatical error already sits in B.
• E is wrong because an error exists.

Common Pitfalls:
Using adjectives to modify verbs; forgetting fixed prepositional partners of verbs like “affix to”, “attach to”, “pin on/onto”.

Final Answer:
firm affixed