A)
Cd=\(\frac {D_f+D_P}{Sq_∞}\)
B)
Cd=\(\frac {D_f+D_P+D_i}{Sq_∞}\)
C)
Cd=\(\frac {D_f+D_P+D_i}{Sq_∞}\)
D)
Cd=\(\frac {D_f+D_P}{Sq_∞}\)+Di

Correct Answer :