Explanation:

- Option 1: Section 339 Cr. P.C.

- This section deals with the procedure when an accused does not understand proceedings due to unsoundness of mind.

- Option 2: Section 344 Cr. P.C.

- This section specifically deals with the summary procedure for trial for giving false evidence.

- It's designed for cases where it's clear that false evidence has been given and a summary trial can be conducted right in the court where the false evidence is detected.

- Option 3: Section 388 Cr. P.C.

- This section relates to the effect of a pardon granted under section 306, 307, or 308.

- Option 4: Section 458 Cr. P.C.

- This section deals with the procedure when investigation cannot be completed in twenty-four hours.

Correct Answer: Option 2 - Section 344 Cr. P.C.