Which amongst the following statements is/are not correct ?
1.     Isthmus is a narrow strip of land joining two landmasses.
2.     The North America continent lies completely in the Northern and Western Hemisphere.
3.     World's longest mountain range and the largest river are in the South American Continent.
The correct answer is B
The curie law, x = C/T, expressing susceptibility x varying with absolute temperature T, is obeyed by:
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Which of the following is not an insulator?