The given question asks us to identify the objects named "Cheetah" and "Chetak5". The correct answer is option 2, which states that they are helicopters.

Option 1 states that they are fighter aircraft. However, this is incorrect as both "Cheetah" and "Chetak5" are not commonly known as fighter aircraft.

Option 3 suggests that they are armored vehicles. However, this is also incorrect as they are not typically referred to as armored vehicles.

Option 4 proposes that they are infantry regiments. However, this is also incorrect as "Cheetah" and "Chetak5" are not typically used to refer to infantry regiments.

In conclusion, the correct answer is option 2, which states that "Cheetah" and "Chetak5" are helicopters.