Puzzle Time

This is one irritating problem, that I did recently:

Q1. Which is the first question where c) is the correct answer
a) Q3
b) Q4
c) Q1
d) Q2

Q2. Which is the first question where a) is the correct answer
a) Q4
b) Q2
c) Q3
d) Q1

Q3. Which is the first question where d) is the correct answer
a) Q1
b) Q2
c) Q4
d) Q3

Q4. Which is the first question where b) is the correct answer
a) Q2
b) Q4
c) Q3
d) Q1

What are the answers to the four questions ?