The correct answer is option 2, which states that the countries in the elite group of constructing indigenously built stealth warships are Russia, the United States, and the United Kingdom.

Let`s analyze each option:

Option 1 (1, 2, and 3): This option suggests that Russia, the United States, and Germany are in the elite group. However, Germany is not included in the answer provided, so this option is incorrect.

Option 2 (1, 2, and 4): This is the correct answer. It includes all the countries mentioned in the question - Russia, the United States, and the United Kingdom.

Option 3 (2 and 4 only): This option suggests that only the United States and the United Kingdom are part of the elite group. However, Russia is not included, so this option is incorrect.

Option 4 (1 and 3 only): This option suggests that Russia and Germany are part of the elite group. However, the United Kingdom is missing from this option, so it is incorrect.

In conclusion, option 2 is the correct answer as it includes all three countries - Russia, the United States, and the United Kingdom - mentioned in the question as part of the