Concept:To convert decimal 28 to binary, repeatedly divide by 2 and note the remainders.Explanation:28÷2=14 remainder 014÷2=7 remainder 07÷2=3 remainder 13÷2=1 remainder 11÷2=0 remainder 1Reading the remainders from bottom to top gives 111002.Hence, the binary form of 28 is 11100.Answer:11100Option D.