Statement I : B–F bond length in BF₃ is less than in ${\mathrm{BF}}_4^{-}$

Statement II : Back bonding is present in BF₃ but not in ${\mathrm{BF}}_4^{-}$

.

• A

  Both Statements are true

• B

  Statement I is true Statement II is false

• C

  Statement I is false and Statement II is true

• D

  Both Statements are false