Argument I: This argument states that India should stop missile development because the USA desires it. This argument is weak because decisions about national defense should not be based solely on the desires of another country, especially one as complex as the USA.
Argument II: This argument asserts that the nation must stay up-to-date in its defense preparedness, which is a strong argument. National security and defense capabilities are critical for a country's sovereignty and safety.
So, the correct option is (B): If only argument II is strong.