Co - prime numbers are the numbers which have only one common divisor = 1 or their HCF = 1.

Here for option (i) HCF(14,25) = 1.

For option (ii) HCF(18,25) = 1.

For option (iii) HCF(31,93) = 31.

For option (iv) HCF(32,62) = 2.

So answers will be (i) and (ii).