How many σ and π bonds are present in ea...

How many `σ` and `π` bonds are present in each of the following molecules?
(a) `HC≡C CH=CHCH_(3)` (b) `CH_(2)=C=CHCH_(3)`

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`sigma _(C -C) : 3 , sigma _(C - H) : 6, pi _(C - C) : 2.`

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