General Knowledge Science Technology and Inventions

ନିମ୍ନଲିଖିତ ଉପକରଣ ମଧ୍ୟରୁ କେଉଁଟି ଗ୍ରାହାମ ବେଲ ଉଦ୍ଭାବନ କରିଥିଲେ?

1

ଟେଲିଫୋନ୍

2

ଡାଇନାମାଇଟ୍

3

ଟେଲିଭିଜନ

4

କମ୍ପ୍ୟୁଟର

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