I think the solution can be reached using the following logic.
(1) No, it can’t be evaluated if inherits from the parent.
(3) No, because it can be evaluated if it depends upon the attributes of a left sibling which make it non-synthesized attribute.
(4) 3rd point’s logic makes this option wrong too.
Now coming to 2nd point. If it is not L-attributed then it is not even S-attributed. And we saw that there are only 2 possibilities to be able to parse in a BOTTOM-UP fashion (first is when attributes depend on the child’s attributes or when depends on a left sibling). Hence there are possibilities to be able to solve when grammar is L-attributed but not all L-attributed grammars can be solved using BUP.
Please correct me if my answer is wrong.