The major product (Y)in the following reaction sequency is `:`
`CH_(3) - overset( CH_(3))overset(|)(C)H - CH= CH_(2) overset( Br_(2) //H_(2)O)(rarr) X overset("conc."H_(2)SO_(4)//Delta)(rarr)Y`

Options

A. `CH_(3) - overset(CH_(3))overset(|)(C)H -CH= CH-Br`
B. `CH_(3) - underset(H)underset(|)overset(CH_(3))overset(|)(C) -underset(Br) underset(|)(C) = CH_(2)`
C. `CH_(3) - overset(CH_(3))overset(|)(C)=underset(Br)underset(|)(C) - CH_(3)`
D. `CH_(3) - overset(CH_(3))overset(|)(C) = CH-CH_(2)- Br`

Explanation

To find the major product (Y) in the given reaction sequence, we will analyze the steps involved in the reactions.

### Step 1: Identify the starting material
The starting material is 3-methyl-but-1-ene, which can be represented as:
\[ \text{CH}_3 - \text{C}(\text{CH}_3) - \text{CH} = \text{CH}_2 \]

### Step 2: Reaction with Bromine Water (Br₂ in H₂O)
When 3-methyl-but-1-ene reacts with bromine water, the double bond reacts with bromine. The bromine adds across the double bond, forming a cyclic bromonium ion intermediate. The water (acting as a nucleophile) will then attack the more substituted carbon of the bromonium ion.
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