MCQ
Which joint allows movement in all directions?
- AHinge.
- BPivot.
- ✓Ball and socket.
- DGliding.
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S.No.
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Column-I (Name of gas in Air)
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S.No.
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Column-II (% age of gas in air)
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$A.$
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Oxygen
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$(p)$
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$20\%$
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$B.$
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Nitrogen
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$(q)$
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$79\%$
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|
$C.$
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Carbon dioxide
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$(r)$
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$0.04\%$
|
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$D.$
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Other gases
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$(s)$
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Less than $1\%$
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