Correct option is C
The correct option is (c).
• Explanation: The sentence gives a standard safety advice. It is inherently dangerous and unsafe to board a vehicle that is in motion. Hence, the adjective 'moving' is logically the most appropriate descriptor for the vehicle in this context.
• Correct answer word – Moving
Hindi meaning: चलती हुई (वाहन)
Example: It is dangerous to jump off a moving train.
Meanings of other options:
• Stationary – Not moving; staying in one place (स्थिर)
• Sedentary – Involving much sitting; inactive (गतिहीन / बैठे रहने वाला)
• Standing – Stationary, upright, or parked (खड़ा हुआ)
So the correct answer is (c)