Assertion : $\mathrm{B}_2 \mathrm{H}_6, \mathrm{Si}_2 \mathrm{H}_6$ are said to have similar structure. Reason : They have same number of $\sigma$ and $\pi$ bonds .

• A

  If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
• B

  If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
• C

  If Assertion is true but Reason is false.
• Correct answer
  D

  If Assertion is false but Reason is true.

Solution

$\mathrm{B}_2 \mathrm{H}_6$ is an electron deficient compound. $\mathrm{B}_2 \mathrm{H}_6$ contain some unusual bonds which are called as 2 -electron 3 -centre bonds.

Hence, the correct answer is option: 'D'.