Which Words

Which is the correct meaning for these words?

1 LITERAL (a) Stonelike

(b) Following the letter (c) Of contest at law

2 MELIORATE

(a) To make better

(b) To become liquefied by heat (c) To produce a sweet sound

3 NAIAD

(a) A naïve person

(b) A fabled water nymph (c) A fine, soft-finished cotton