If I want to know whether Morarji Desai was the first, second, third or fourth PM of India.
How can I ask?
1. What was Morarji Desai's Number as the PM of India?
2. On what number did Morarji Desai become the PM of India?
3. At what number was Morarji Desai in the line of succession as the PM of India?
In the chronology of Indian prime ministers, which number did Moraji Desai hold ?
What rank did Moraji Desai hold in the Indian PM chronological sequence ?