Lex in and o be vectors such that i XC t) 0 Which of the following must be true (always, without exception)? Note: There may be more than one correct answer, soloct all the apply: and v are parailel vectors Either n=0 or v=0 or both None of these are correct i and v are the same vector: ud=0 u and v have an angle of radians (180) between them