World Inventor’s Day is celebrated on _____________?

8th April

9th November

31st April

23rd April

World Inventor’s Day is celebrated on _____________?

10th-class-mcqs-all-subjects9th-class-mcqs-all-subjects11th-class-mcqs-past-papers12th-class-macqs-past-paperscss-islamiat-past-papers-mcqsnts-online-test-preparation