who invented the bifocal glasses

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Q:
Who invented the bifocal glasses?

1
Thomas Alva Edison
2
Benjamin franklin
3
Evangelista
4
Isaac Newton

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Answer : 2. "Benjamin franklin"

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GK General Science Questions

Q:
Who invented the bifocal glasses?

Answer : 2. "Benjamin franklin"

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Q: Who invented the bifocal glasses?

Answer : 2. "Benjamin franklin"

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Q:
Who invented the bifocal glasses?

Q.
Which Indian state has the least literacy rate?

Q.
Which language is spoken in Karnataka?

Q.
What is the chief source of political power in India?

Q.
Which one of the following plants is popularly grown along the road for absorbing vehicular pollutants?