a); and c). During Chandragupta II reign, great impulse was given to arts and science. One of the main scholars of the time was Aryabhata, who came up with the concept of zero and discovered the ratio of pi. He also worked in demonstrating that the earth moves around the sun instead of otherwise.
Arctic and Indian are both oceans
Although the Irish potato blight receded in 1850, the effects of the famine continued to spur Irish emigration into the 20th century. Still facing
poverty and disease, the Irish set out for America where they reunited with relatives who had fled at the height of the famine.
The three phases of the Revolution- the Moderate, the Radical, and the Conservative Phase- went on for 10 years:1789-1799.
