In binary system the decimal number 0.3 can be expressed as

• Correct answer
  A

  $(0.01001 \ldots . . .)_2$
• B

  $(0.10110 \ldots . . .)_2$
• C

  $(0.11001 \ldots)_2$
• D

  $(0.10101 \ldots)_2^2$

Hence, the correct answer is option: 'A'.