Which of the following is not a weighted code? Select one O A. None of them Spark O B. Binary number System C. Excess 3-code D. Number system The following circuit is for ........ 00 HIGH HIGH J J Q1 CLK CLK CLK pain K K K Q JKFF JKFF Select one: A Sync down counter B. Async up counter e C. Async down counter OD Sync up counter How many outputs are required for a 4-bits digital comparator? Select one: O A. 8 O B. 3 O C.6 D. 4