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থিম নির্বাচন

আপনার পছন্দের থিম বেছে নিন।

which of the following statements is valid ?

A. There have been fewer changes in the 20th century them in the previous one.
B. Everyone knew that changes would come very fast .
C. Most changes have come through the microchip .
D. It has become impossible to contact friends .
সঠিক উত্তরঃ C. Most changes have come through the microchip .
Explanation: