Question

If anybody knows the truth let them tell it. (correct sentence)​

Answer 1

Answer:

if anybody knows the truth tell it..

Explanation:

plz follow me I will follow u back definitely

Answer 2

Answer:

The correct form of the sentence ‘If anybody knows the truth' 'let them tell it' is ‘If anybody knows the truth, let them say it.’  

Explanation:

The word 'tell' is generally not used to report 'what someone has said.' When the words of a person are being repeated, the word ‘say’ is always used. While 'reporting what a person has said', ‘say’ should be used.

Tell can be used with indirect speech with an indirect object.

So, in this sentence, say is the right word.