Given below are two statements: Statement-I: Frenkel defects are vacancy as well as interstitial...

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Given below are two statements:
Statement-I: Frenkel defects are vacancy as well as interstitial defects.

Statement-II: Frenkel defect leads to colour in ionic solid due to presence of F-centres.
Choose the most appropriate answer for the statements from the option given below.
(a) Statement-I is true but statement-II is false
(b) Both statement-I and Statement-II are true
(c) Statement-I is false but Statement-II is true
(d) Both statement-I and Statement-II are false
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