Fill in the blanks.
(i) The HCF of two co-prime numbers is P.
(ii) Two natural numbers which have no common factor except 1 are called Q numbers.
(iii) If a number is divisible by 9 then sum of its digits must be divisible by R.
| P | Q | R | |
| A | 1 | prime | 3 |
| B | 1 | co-prime | 9 |
| C | 0 | prime | 9 |
| D | 0 | co-prime | 3 |