Statement-1 : Boron has relative atomic mass 10.81.
Statement-2 : Boron has two isotopes `._5^10B` and `._5^11B` and their relative abundance is `19%` and `81%`.
A. Statement-1 : is True, Statement-2 : is True, Statement-2 : is a correct explanation for Statement-1 :
B. Statement-1 : is True, Statement-2 : is True, Statement-2 : is NOT a correct explanation for Statement-1 .
C. Statement-1 : is Ture, Statement-2 : is False.
D. Statement-1 : is False, Statement-2 : is True.
