A : In alkene, hydroboration oxidation process is an example of pericyclic reaction.
R : `BH_(3)` forms the cyclic transition state with double bond.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. if Assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To analyze the given statements regarding the hydroboration-oxidation process in alkenes and determine if the assertion (A) and reason (R) are correct, we can follow these steps:

### Step 1: Understand the Assertion (A)
The assertion states that the hydroboration-oxidation process in alkenes is an example of a pericyclic reaction.

### Step 2: Define Pericyclic Reactions
Pericyclic reactions are a class of reactions that occur through a cyclic transition state and involve a concerted process, meaning that bonds are formed and broken in a single step without intermediates.

### Step 3: Analyze the Hydroboration-Oxidation Process
In the hydroboration-oxidation process:
1. An alkene reacts with diborane (B2H6) or borane (BH3).
2. The boron atom adds across the double bond of the alkene.
3. This reaction forms a cyclic transition state where the boron interacts with the double bond of the alkene.

### Step 4: Understand the Reason (R)
The reason states that BH3 forms a cyclic transition state with the double bond. This is indeed true, as the addition of borane to the alkene involves the formation of a cyclic arrangement where the boron atom and the alkene's π electrons interact.

### Step 5: Conclusion
Since the assertion (A) correctly identifies the hydroboration-oxidation process as a pericyclic reaction, and the reason (R) correctly explains why this is the case by stating that BH3 forms a cyclic transition state with the double bond, we can conclude that both statements are true and that the reason is a correct explanation of the assertion.

### Final Answer
Both the assertion (A) and reason (R) are true, and the reason is the correct explanation of the assertion.

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