The decimal equivalent of the hexadecimal operation A10 + B21 is
\(A10_{16} = 10 \times 256 + 1 \times 16 + 0 = 2576\)
\(B21_{16} = 11 \times 256 + 2 \times 16 + 1 = 2849\)
Sum = \(2576 + 2849 = 5425\)
(Or add in hex: \(A10 + B21 = 1531_{16} = 4096 + 1280 + 48 + 1 = 5425\).)
Answer: (A) 5425
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