(A): The first ionisation energy of B is less than that of Be (R) : The penetration ability of s- electrons is higher than that of p- electronsThe correct answer is

(A): The first ionisation energy of B is less than that of Be (R) : Th

1.	(A): The first ionisation energy of B is less than that of Be (R) : The penetration ability of s- electrons is higher than that of p- electronsThe correct answer is
Answer» Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A) Both (A) and (R) are true and (R) is not the correct explanation of (A) (A) is true but (R) is FALSE (A) is false but (R) is true Answer :A