BF3 is (RPMT 2010)

According to lewis acid base theory, lewis acid means tendency to accept a pair of electron and lewis base F B F F 61 p-BLOCK (Group 13 - 14) means tendency to donate a pair of electrons. In case of, all the three fluorine atoms have 8 electrons around itself and thus a complete octet but with boron it has only 6 electrons around itself. Thus it is an electron deficient compound. The lewis dot structure of BF3 is shown below: Hence, the correct option is (a).