addl eax ebx ecx addl 0 times 13 edi 4 esi addl esp edx add
     addl %eax, %ebx, %ecx  addl 0 times 13 (, %edi, 4), %esi  addl (%esp), (%edx)  addl %eax, $4  Which choice corresponds to ALL the invalid instructions?  1, 2 and 4  1, 3 and 4  1, 2 and 3  1 only  1, 2, 3 and 4 
  
  Solution
Answer:
1 only
Because add1 takes only two operators not more than two. Since in the first instruction , add1 take more than two operands , hence invald.

