Which of the following statement(s) is/are correct?
A. Only I
B. I and II
C. II and III
D. All of the above
Answer:D
Which of the following statement(s) is/are correct?
A. Only I B. I and II C. II and III D. All of the above
Explanation: Scientists at the Vikram Sarabhai Space Centre, Thiruvananthapuram indigenously manufactured the world's lightest synthetic material called ‘silica aerogel’ or ‘blue air’ or ‘frozen smoke’. Silica Aerogel is the lightest synthetic material ever made by man.