Which of the following statements are true regarding red data book of IUCN?

1. This book contains a record of only animal and bird species which are known to be in danger.

2. Out of the nine categories of species classified by red book, three categories of species are included under threatened species- critically endangered, endangered, vulnerable species.

3. There is an additional category of species called indeterminate species which includes species in danger of extinction but the reason is not known.

Select the correct answer from the codes given below