Which of the following statements is/are correct regarding Gaganyaan?

1. Gaganyaan is the initiative of the Indian Space Research Organisation (ISRO).

2. The objective of the Gaganyaan programme is to demonstrate the capability to send humans to low earth orbit onboard an Indian launch vehicle.

3. Four Indian astronaut candidates have already undergone generic space flight training in Russia as part of the Gaganyaan Programme.

4. ISRO’s heavy-lift launcher GSLV Mk III has been identified for the mission.

Select the correct answer by using the codes given below.