Yes, to both questions.
Interested in Language
In a questionnaire, is it correct say "If yes" instead of "If so"?
e.g. Have you ever applied for grants? If yes, please answer the following questions.
(Is "If yes" is short for "If your answer is yes"?)
Can other words be used in the same way?
For example, "If no", "If others", and "If B" to mean "If your answer is no", "If your answer is others", "If your answer is B (when there are A, B, C, etc.)"?