Which of the following best denotes classical complement pathway activation in immunoinfiammatory condition -: (A) C
2
, C
4
, C
3
 decreased, (B) C
2
 and C
4
 normal, C
3
 is decreased, (C) C
3
 normal and C
2
 C
4
 decreased, (D) C
2
, C
4
, C
3
 all are elevated
Answer is A. None