Which of the following characteristics correctly differentiates a ceramic from a metal?
(i) Metals are generally stiffer than ceramics.
(ii) Ceramics generally have higher melting points than metals.
(iii) Metals are more wear-resistant than ceramics.
(iv) Ceramics are more corrosion-resistant than metals.

• A. (i) and (ii)
• B. (ii) and (iv)
• C. (i) and (iii)
• D. (iii) and (iv)

Answer: (B)