Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Rib knit fabrics are suitable for snuggly fitted garments and are used in wrist bands of sleeves. Reason (R): Rib knit fabrics have alternating lengthwise rows of plain knit and purl stitches that imparts excellent width wise elasticity. In the light of the above statements, choose the most appropriate answer from the options given below:

• A. \( \text{Both (A) and (R) are correct and (R) is the correct explanation of (A)} \)
• B. \( \text{Both (A) and (R) are correct but (R) is not the correct explanation of (A)} \)
• C. \( \text{(A) is correct but (R) is not correct} \)
• D. \( \text{(A) is not correct but (R) is correct} \)

Hint:

Rib knits do not curl at the edges, unlike Jersey knits, which is another reason they are preferred for garment borders and bands.

Answer 1

The Correct Option is A

Concept: The structural arrangement of loops in a knitted fabric directly determines its physical properties, such as stretch, recovery, and thickness.

Step 1: Evaluate the Assertion (A).
Rib knits are characterized by their "ridges" and "valleys." Because of their structure, they can expand significantly and then snap back to their original shape. This makes them ideal for areas that need a tight but flexible fit, such as cuffs, necklines, and wrist bands. Thus, Assertion (A) is correct.

Step 2: Evaluate the Reason (R).
A rib knit is formed by alternating wales (columns) of plain (knit) stitches and purl stitches (e.g., 1x1 or 2x2 rib). This vertical alternating structure acts like a series of springs, providing excellent width-wise elasticity. Thus, Reason (R) is correct.

Step 3: Determine the connection.
The reason why rib knits are used for snuggly fitted wrist bands (Assertion) is precisely because their alternating stitch structure provides the necessary elasticity (Reason). Therefore, (R) is the correct explanation for (A).