What is the type of hybridisation of carbon atoms marked with star.
`(a)overset(**)CH_(2)=CH-""^(**)overset(O)overset(||)C-O-H" "(b)CH_(3)-overset(**)CH_(2)-OH" "(c ) CH_(3)-CH_(2)-overset(O)overset(||)C""^(**)-H`
`(d)overset(**)CH_(3)-CH=CH-CH_(3)" "(e)CH_(3)-overset(**)C-=CH`

Explanation

To determine the type of hybridization of the carbon atoms marked with a star in the given molecules, we will analyze each structure step by step.

### Step 1: Analyze the first structure `(a) CH2=CH-O=C-O-H`
- The carbon marked with a star is part of the double bond (C=C).
- In a double bond, one sigma bond and one pi bond are formed.
- Since this carbon is involved in one double bond and has one single bond (to the other carbon), it is forming three sigma bonds in total (two with hydrogens and one with the adjacent carbon).
- Therefore, the hybridization of this carbon is **sp²**.

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