Is this a set phrase: "the whole truth"?

[juany]

Test No. incompl/elem-1 "Speaking already", question 8

I want you to tell me the ......... truth.

(a) all
(b) exact
(c) real
(d) whole

Test No. incompl/elem-1 "Speaking already", answer 8

I want you to tell me the whole truth.

Correct answer: (d) whole

Your answer was: correct
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what's the meaning of whole

[Yo]

whole means all, entire, everything, full, etc.