Discussion
Assertion (A): Lead is used only in fritted form in modern glazes where it is used at all.
Reason (R): Raw lead compounds are soluble and toxic to those handling them.
Answer: C
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason is the cause. Raw lead compounds are soluble and readily absorbed, so they present a real hazard to the people preparing and applying the glaze. Fritting binds the lead into a glass in which it is far less available, and in many jurisdictions raw lead in a glaze is prohibited outright - the frit is the condition on which lead may still be used at all.
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