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An instrument which can be used for ranging is

AOdometer

BCross staff

CClinometer

DPedometer

Answer:

B. Cross staff


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A statement is given followed by two assumptions numbered I and II. You have to assume everything in the statement to be true and decide which of the given assumptions is/are implicit in the statement.

Statement:

The demand for smartphones and laptops has increased substantially since the introduction of online classes in schools.

Assumptions:

I. People are buying smartphones and laptops to enable their children to attend online classes

II. Desktop computers cannot be used to attend online classes.