born between g and c. as many persons were born before c was born after f.
case 1 will be dropped because h was born in a month which has less than 31 days.
case 3 will be dropped because two persons were born between e and a. as many persons were born before e was born after d. e was born before d.
2. how many persons were born between g and b?
3. if f is related to b, a is related to d, in the same way which of the following is related to c?
4. four of the following five are alike in a certain way based on the above arrangement. 