Analyzing Word Formation with Prefix 'C'

The question asks us to evaluate a list of words: ONE, TWO, BEN, and MUG. We need to determine which of these words form a meaningful English word when the letter 'C' is added specifically to the beginning of each word.

Step-by-Step Word Testing

Let's systematically add the prefix 'C' to each word provided and see the result:

• For the word ONE: Adding 'C' results in CONE.
• For the word TWO: Adding 'C' results in CTWO.
• For the word BEN: Adding 'C' results in CBEN.
• For the word MUG: Adding 'C' results in CMUG.

Identifying Meaningful English Words

Next, we check if these new combinations are recognized as valid English words:

• CONE: This is a standard English word. It can refer to a geometric shape or an edible item (like an ice cream cone).
• CTWO: This combination does not form a standard English word.
• CBEN: This combination does not form a standard English word.
• CMUG: This combination does not form a standard English word.

From this evaluation, it's clear that only the original word ONE produces a meaningful English word, CONE, when the prefix 'C' is applied.

Conclusion on Word Formation

Based on the step-by-step testing, adding 'C' to the words ONE, TWO, BEN, and MUG results in only one meaningful English word: CONE, which comes from the original word ONE.