STATEMENT -1 : `H_(3)PO_(4)` is a tribasic acid.
and
STATEMENT -2 : In `H_(3)PO_(4)`, only two H-atoms are replaceable.
A. Statement -1 is True, Statement -2 is True, Statement -2 is a correct explanation for Statmenet -1.
B. Statement -1 is True, Statement -2 is True, Statement-2 is NOT a correct explanation for Statement -1
C. Statement -1 is True, Statement -2 is False
D. Statement -1 is False, Statmenet -2 is True