A thin lens of focal length `f` is used as magnifying glass..Which of the following statement regardind the situations is true?

A concave lens is used as a magnifying glass.

Which type of lens is used as magnifying glass?

What kind of lens is used as a magnifying glass ?

A converging lens of focal length 6.25 cm is used as magnifying glass. If the near point of the observer is 25 cm from the eye and the lens is held close to the eye, calculate the distance of the object from the lens

A double convex lens of focal length 15 cm is used as a magnifying glass in order to produce an erect image which is 3 times magnified. What is the distance between the object and the lens ?