Difference between say and tell

[CLAU]

Test No. incompl/inter-9 "Say/Tell", question 7

It's no good trying to persuade me because I'm not ......... a word.

(a) tells
(b) saying
(c) telling
(d) told

Test No. incompl/inter-9 "Say/Tell", answer 7

It's no good trying to persuade me because I'm not saying a word.

Correct answer: (b) saying

Your answer was: incorrect
It's no good trying to persuade me because I'm not telling a word.
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hello
would you explain me what is the difference between TELL and SAY in this context?
THANK YOU

[Torsten]

Please, take a look at these three sentences:

Maria didn't say anything.
Maria didn't tell her husband anything.
Maria didn't say anything to her husband.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[vivek kumar mishra]