Discussion
Assertion (A): Most whiteware bodies contain both ball clay and china clay rather than one or the other.
Reason (R): One supplies plasticity and the other whiteness, and neither provides both.
Answer: C
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the necessity. China clay fires white but is too short to throw or cast well; ball clay works beautifully but darkens the fired body. Blending them lets the potter buy exactly as much plasticity as the forming method needs and no more colour than the ware can tolerate - and the ratio is one of the standard levers in body formulation.
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