20) What is the result of the following additions of those two binary numbers 0101+0111 A) 1100 B) 1011 C) 0111 D) none of them 21) What is the result of the following subtraction of word size numbers 0111-0101 A) 0010 B) 0011 C) 0001 D) none of them 22) bits in a byte is A) 8 B) 16 C) 32 D) none of them 23) bits in a hex digit is A) 8 B) 16 C) 32 D) none of them 24) bytes in a word is B) 2 C) 4 D) none of them 25) bytes in a quadword is A) 2 B) 4 C) 8 D) none of them 26) What is the name of the register in which 80x86 flags are stored? A) EDX B) EAX C) EFLAGS D) none of them