@Arjun sir, i think the answer is D.
LL(0) means the grammar which can be generated with 0 look-a-heads.
So we have to generate a string even without looking at the first production symbol. this is only possible if there is only 1 string that the grammar can generate.
S -> abc
now to generate the language of the grammar we need not even look at the sarting symbol 'a', because the only string it can generate is 'abc'
The tests are there but it ain't free. Cost is...