What is the literal meaning of Islam is_____ ?

A. To bow down the neck
B. To obey
C. To have safety
D. All of these

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Instrument used for measuring very high temperature is:

A. Pyroscope
B. Pyrometer
C. Seismograph
D. Xylometer

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Sound waves are ___ waves.

A. Transverse
B. Electromagnetic
C. Longitudinal
D. none of these

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