What is correct order of ionisation enthalpy of Li, Be, B, C of first period and Na, Mg, Al, Si of second period ?

What is correct order of ionisation enthalpy of Li, Be, B, C of first

1.	What is correct order of ionisation enthalpy of Li, Be, B, C of first period and Na, Mg, Al, Si of second period ?
Answer» `Li lt B lt Be lt C " and " Na lt Al lt Mg lt Si` `Li lt Be lt B lt C " and " Na lt Mg lt Al lt Si` `C lt Be lt B lt Li " and " Si lt Mg lt Al lt Na` NONE of these Solution :`Li lt B lt Be lt C " and " Na lt Al lt Mg lt Si ` ` :. B lt Be, Al lt Mg` ` :. B ` and Al having half filled `p^(3)` configuration.