इसरो (ISRO) ने भारत का पहला उपग्रह 'आर्यभट्ट' 19 अप्रैल को किस वर्ष प्रक्षेपित किया था?

The term 'Wet Dress Rehearsal' is best described as:

Which of the following statements is/are correct regarding the Chandrayaan-1 mission? I. It was the first lunar exploration mission of India. II. It confirmed the presence of water molecules on the Moon.

Consider the following statements about precious metals in asteroids: A. Some M-type asteroids contain significantly higher concentrations of platinum-group metals than any primary mine on Earth. B. The concentration of precious metals like platinum in specialized metallic asteroids is typically measured in tens of grams per ton. C. Extracting and refining platinum directly from asteroid bodies is highly straightforward and easily achievable with current, commercially off-the-shelf space technologies. Which of the statements given above are correct?