Step 1: Understanding X-37B.
The X-37B is an unmanned spaceplane developed by the U.S. military. It has been used for classified missions in Earth's orbit and is a key asset in space exploration and research.
Step 2: Analyze the options.
Final Answer: (4)
Choose the correct pair from the following:
Match the following:
A | B | C | D | Average |
---|---|---|---|---|
3 | 4 | 4 | ? | 4 |
3 | ? | 5 | ? | 4 |
? | 3 | 3 | ? | 4 |
? | ? | ? | ? | 4.25 |
4 | 4 | 4 | 4.25 |