In Which Order Should Chemical Treatments to Visualize Latent Prints

Multiple Choice

In which order should chemical treatments to visualize latent prints be performed?
1. ninhydrin
2. iodine fuming
3. physical developer

A) 1, 3, 2
B) 3, 1, 2
C) 1, 2, 3
D) 2, 1, 3
E) 3, 2, 1