which suffix means pertaining to conditions present at birth

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ical,iac,ic,ial

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*ical
*iac
*ic
*ial

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I don't think any of those suffixes mean present at birth.

I don't either.

The suffix that means "pertaining to conditions present at birth" is "-natal." To determine this, we can break down the word "prenatal" which refers to the time before birth. By knowing the meaning of the prefix "pre-" (which means "before") and the use of the root word "natal" (which relates to birth or newborn), we can understand that the suffix "-natal" denotes a condition relating to birth. Therefore, when looking for a suffix that means "pertaining to conditions present at birth," "-natal" is the correct choice.