( 2 C 3 4 5 6 7 8 9 3. Greece imported indigo dye/olive oil from India in ancient times. 4. The people of Mohenjo-Daro were the first to use buttons made out c plastic/seashells. 5. The weighing scale/paper was first used by the Indus Valley civilisation 6. Nawab Siraj-ud-Daulah/Tipu Sultan was the first to use military rocket encased in iron cylinders in his fight against the British East Indi Company. 7. Brahmagupta/Aryabhata developed a formula to find the area of any quadrilateral whose corners touch the inside of a circle. 8. Wootz steel was a superi