Reason (R): Absence of bond gap is the main reason for high thermal conductivity.
A. Both (A. and (R) are correct and (R) is the correct explanation of(A).
B. Both (A) and (R) are correct but (R) is not the correct explanation of(A).
C. (A) is correct but (R) is wrong.
D. (A) is wrong but (R) is correct.
Answer:B
Reason (R): Absence of bond gap is the main reason for high thermal conductivity.
A. Both (A. and (R) are correct and (R) is the correct explanation of(A). B. Both (A) and (R) are correct but (R) is not the correct explanation of(A). C. (A) is correct but (R) is wrong. D. (A) is wrong but (R) is correct.