Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Butan-1-ol has higher boiling point than ethoxyethane.
Reason R: Extensive hydrogen bonding leads to stronger association of molecules.
In the light of the above statements, choose the correct answer from the options given below :

Assertion A: Butan-1-ol has higher boiling point than ethoxyethane (diethyl ether).

Reason R: Extensive hydrogen bonding leads to stronger association of molecules.

Analysis of Assertion A:

Butan-1-ol (CH₃CH₂CH₂CH₂OH) has a boiling point of approximately 117.7°C.

Ethoxyethane (CH₃CH₂OCH₂CH₃, diethyl ether) has a boiling point of approximately 34.6°C.

Both have the same molecular formula C₄H₁₀O, but butan-1-ol has a significantly higher boiling point.

Assertion A is True.

Analysis of Reason R:

Butan-1-ol has an -OH group capable of forming extensive intermolecular hydrogen bonds, leading to stronger molecular association and higher boiling point. Ethoxyethane cannot form H-bonds with itself (no O-H or N-H groups).

Reason R is True and correctly explains Assertion A.

The correct answer is Option B: Both A and R are true and R is the correct explanation of A.