The correct answer is: A. 06
A lost token notice is issued when a token is lost. It is valid for 6 months. This means that the owner of the token can use the notice to replace the lost token within 6 months of the date of issue. After 6 months, the notice will no longer be valid and the owner will need to apply for a new lost token notice.
Option B is incorrect because a lost token notice is valid for 6 months, not 4 months.
Option C is incorrect because a lost token notice is valid for 6 months, not 3 months.
Option D is incorrect because a lost token notice is valid for 6 months, not 2 months.